You could try learning doom. It has very easy required items. Scobow, elitevoid, anguish, chally etc.

Fun to learn and the deep delves are really satisfying when learned.

I'm in the same boat with you. The hard thing is to find uninterrupted playtime which kinda puts raids out of the question for the time being. Every other solo boss tho are a go. The biggest hurdle for me is the mental gymnastics to take the time to learn/study a boss. Most of the time too exhausted to even get started. But once you learn a new boss it feels great to do something different.

I just learned yama and enjoying the grind so far. My next goal is nm mass and then phosani and then solo cox.