I’ll give you the same advice Inarius gave recently on the Forum and I instinctively followed when I began this Season(albeit late):
Farm NM TZ for a bit.
Don’t slam your head against the Hell brick-wall and get frustrated.
Check this post by Zax on TZ’s if you haven’t already(or don’t already know their potential for gearing and drops).
Good Luck!!
p.s. I’m pretty casual too. I can’t “play like a bot” which is what a lot of people suggest. Targeting 1 or 3 or 5 individual monsters is sleepy time for me. I need challenge, density and content. It doesn’t pay very well, but at least it’s interesting.