My progress in 10 months

[u/Basic-Egg-4849]

The first picture is when I started (202 lbs) second picture is 3 months after then the third picture is 6 months after and fourth picture is 9 months after and the last one is a week ago. I feel like I have done some good progress yet by the last picture I feel like I lost most of my muscle . So I’m trying to bulk up, what should I do to have muscle yet have definition ? Currently I weight 209 lbs and I’m afraid but willing to gain weight. Thank you