I’d love to hear more about your dermarolling experience (what your method is like, what types of creams you use, your daily regimen etc).
Thank you again!

Hi, hopeful ^^ I don't have extensive dermarolling experience because I started in late March, but I'll share my experience and, perhaps, you can glean something useful from it.
My daily skincare regimen consists of:
Morning:-Sunblock: Neutrogena UltraSheer liquid SPF 55 sunblock. I apply 20-30 minutes before leaving for work, and I try to reapply every 2-3 hours when possible. I have oily skin, but this doesn't break me out. It's matte, which I like, and it doesn't pill when I reapply. You can find it in large drugstores for around $13-14 per 1.4 fl oz bottle.
-Cleanser: I've been taking care of my skin for 18 years, and anything that doesn't abrade is fine.
Night: Moisturizer: I use Lumene's Vitamin C+ Pure Radiance 24 h Lotion (also available at large drugstores $20-ish). It's a nice moisturizer. I like the citrus scent, it moisturizes, hasn't made me break out after a month of use, but it's not Christmas miracle. I'm going to switch to Jason Pure Ester-C moisturizer when I use up this bottle. It's cheaper, and it's highly rated.
Spot treatment: Proactiv AHA toner. I spot treat on active pimples or when I feel a bump that indicates a pimple is scheming to take over my face's real estate. 1/3 of the time, this prevents the pimple from forming. Another 1/3 the time, the pimple forms but comes to a head quickly, instead of chilling with its buddies on my face. The other 1/3 of the time, it does nothing.
Dermarolling:I bought a 1.5mm and started my treatment by rolling once weekly per the instructions of the manufacturer and merchant websites, but I've reduced that to every 5 weeks. This gives my skin a chance to heal instead of it undergoing weekly cycles of inflammation. I've seen improvement in some shallow scars after about 2 months of treatment and my skin texture has improved a little. With dermarolling, and any other acne scar treatment, time is the most important factor. The pimple that took two weeks to develop, then spent a week or more on the skin before scarring, will take years of upkeep. God forbid I should finally see results when I'm 80, but dermarolling requires time before significant improvement.
I choose a time when I will have at least an hour to myself for dermarolling. I also won't go out for the rest of that day and the day after. I prepare by getting my supplies together. Using a cup, I pour in as much isopropyl alcohol as needed for the dermaroller head to be submerged. I get some paper towels, tie my hair back, and prepare for pain

You could use a skin numbing cream, but I don't like to put anything on my skin that isn't absolutely necessary.
The skin needs to be pulled back, and then I roll over small sections 5x horizontally, vertically, then diagonally. The pain level depends on the amount of pressure applied to the skin. Please don't try to push all 1.5 mm into your skin. I haven't measured how deeply the needles penetrate, but it seems only the sharp tip fully penetrates. I apply enough pressure to see redness and occasionally tiny drops of blood may appear. That's normal. If you see that your face is becoming a bloody mess, then you are using too much pressure. I wash the roller head in the alcohol after each section. I also disinfect the just-rolled area with some alcohol and then apply the vitamin c moisturizer (c supposedly helps promote collagen development).
I DO have a warning. Be very careful when rolling your nose. I have some icepick scarring on the sides of my nose, and they didn't improve after dermarolling. They might have even gotten a little worse, I don't know. I learned too late that the skin there responds differently than skin on the rest of your face.
I don't break out in huge pimples after dermarolling, but some areas do get tiny, tiny whiteheads, but they don't develop into pimples, and they go away fairly quickly. Your skin will also be red-pink for day or two. The areas that were treated will become dry and it will feel slightly scabby, but it isn't actual scabbing. If you wear makeup, that dry, scabb-ish skin will be a problem.
Microdermabrasion: I'm using the PMD, just like you ^^ I did my first treatment last week, and I messed up

I tested a section of my wrist to get an idea of how it would work. Next, I treated my forehead, nothing bad. Then I brought it to an area of my cheek that is scarred, and the PMD took on a life of its own -- that's my story and I'm sticking to it!! I was taken by surprise by the strong suction, and couldn't move it away fast enough. I had scabs from last Saturday's treatment that just fell off today. I'm sure the scabs made me look extra beautiful this week...

Still, I'm not giving up. I've been dealing with acne for so long that little setbacks like this don't faze me.
This post is getting super long. I hope you made it to here ^^