Looks pretty normal for heavy work 4 weeks in. Assuming those areas are not "hot" or painful (indicating infection) then you're on a normal path for 4-8 weeks healing time.
Hard to tell where that is on your arm, but any area that gets stretched or bumped a lot is prone to extra time for healing and potential touch-ups.
That's a lot of solid black for a 1st tattoo. Would love to see what you're working on, there. More pictures?
