I've welded a handful of times using Mig, but only to attach something to another in the shop (ya.....welding, dummy)

Needed to reinforce my trailer floor, so I bought the Titanium Flux 125 from HF

Ran about 6 practice beads, then went to town.

I think my problem (one of) is going too fast. I was welding into some thinner material and didn't want to melt through it.

I see moments of great welds for 4 or 5 pools. Then shite, then decent again. There seems to be a lot of BB's that attatch too.

Looking for any advice.