The first thing you need to decide is whether to join a corp. Corps have a lot offer: infrastructure, backup, and community. Since you are coming back after a break a corp can help you get up to speed faster. On the other hand there is more freedom and less obligations if you go it alone.
With low power citadels getting harvested for loot these days there are a lot of unoccupied systems. You can easily put down an astra for yourself in one of these. As long as you keep it powered (which is pretty cheap) and use a little common sense you are unlikely to be evicted from any low class hole. Hobo living is another option that can work if you are looking for something temporary or have a very intermittent play style. If you go that route you should look for a shattered system to take advantage of the enhanced anom spawn rate.
Your ship selection is limited if you go the hobo route. A T3C could scan, hack, and run anoms with different fits but a more effective option would be to use a rattle for the combat sites and some other covops for the scanning and hacking. You will also need a roller to secure the hole for ratting sessions. Stash a few pvp ships in the orca to your taste. Finally make a few alpha clone scouts to seed your hole in case you get rolled or podded out.