I'm doing the same thing (working while I get started) but I'm fortunate enough that I'm already working from home and I'm off at 1:30 PM every day. Plus my daughter is at her dad's quite a bit now that school is out. But even with those advantages, I've still been extremely busy. Between my "day job" and stuff I've been doing for my business, I'm putting in a LOT of hours.
I also did my website first because I see that as my "online office" and you have to have your office building ready before you can move in.

My next step is to work on advertising and networking (next week!) and until those efforts start to pay off I'm setting up things like my billing software, contracts, etc. in the meantime.
I'm soooo glad someone asked about this because I like hearing the advice you're getting so far!