I'm not an expert, but I am managing to stumble my way through my tax return for the first time this year (and last time, as I renounced in 2016). I paid an accountant to get compliant and do streamlining, etc, and I'm working from those previous returns. I'm finding that if I just follow the 1040 line by line, diverting off to the various schedules and other forms as they come up, reading instructions of 1040 and the other forms as I need to work something out, then I can pretty much work it out as I go along.
I won't lie - it's a pain and at times I feel like I fall down a labyrinth of forms-within-forms-within-forms. But I feel, at the moment, that it's doable.