Not until we are lost do we begin to understand ourselves

>> Way back in the day I had a LiveJournal, and imagine my delight when I found DW and it's basically the same thing! <<

newcomers has lots of resources about how to use Dreamwidth and where to find things you'll enjoy here. If you're coming from Tumblr, soc_puppet has posted tutorials for that angle. Find your Tumblr friends here.

The Follow Friday Master Post has lists of active communities by topic where you can look for some based on your interests, including some of the Most Useful Communities. Many bloggers use recurring posts to pin down their key interests and maintain activity, which is also a good source of inspiration if you aren't sure what you want to post yet.

This month's big event is marchmetamatterschallenge for archiving or writing new meta such as reviews, canon overviews, or fanifestos.

>> Hobbies
I don't know what I like to do in my spare time anymore <<

You might like the general hobby communities like get_knitted or everykindofcraft.

>>I also want to pick up art and drawing again, as I haven't drawn for fun since before I went to university.<<

There are plenty of Graphics communities.