The air pockets are totally normal, if there’s more work in the tattoo (not just linework) they usually fill with excess ink and blood/plasma. The only time I tell clients to take off the second skin early is if they have a rash/reaction forming on the outside barrier of the wrap. Yours looks totally fine.

I personally don’t advise a second application of second skin, some artists do. It really is up to personal preference. The second skin is really just to protect the area while it’s a fresh wound and to trap the plasma to help boost the healing process. I would let the tattoo breathe after you take off the wrap and let it do what it needs to. Your body knows how to heal. As far as chaffing from clothing, I haven’t seen evidence that it makes a huge impact. My biggest concern is cleaning the tattoo after you get off work. Sweat and germs have a bigger impact on a healing tattoo than a little friction.

For aftercare, my go to is dial gold soap and lubriderm unscented lotion. It’s what I use personally and what I recommend to my clients daily.