Derminator 2 - starter product questions

Hi,

Just about to pull the plug on buying the Derminator 2. Been watching videos and trying to do my research but I still have a few questions.

1. Should I purchase the HA gliding serum from the derminator website as well, or is there a better place to order some? I want to get a booster because I heard it helps healing time which is one of my main concerns as I don't have the time to stay home. Are there some boosters/gliding serums I can purchase online? Do you just apply them to the face and then microneedle? I saw some videos where people just go straight in with no gliding serum... why would you do that?

2. Do I need the infadolan? Can I just use A&D ointment? I believe when I got it done professionally, she had me use my moisturizer + A&D ointment for a few days. I'm also confused about the sterilizing agent... is that necessary? I can't see myself making a gallon of it... is there something else I can buy?

3. I see people buying an extra magnet, I'm going to get one just because it's cheap, but the website says it can fly out... what? LOL.

4. I saw some videos where people just go straight in with no gliding serum... why would you do that? I also saw some people not using numbing cream... which seems crazy to me. I plan to start at 0.5mm and maybe work my way up to 1.0mm, but the plan is to do it once a month or so and have less downtime. Any other pointers?

TIA!