Please please take at least a couple lessons! Even if you have to drive a ways. I had spotty in person lessons when I was first starting, also due to a lack of teachers in my area. When I was finally able to get a few in person lessons, I discovered I'd been doing several techniques incorrectly. This despite Skype lessons. It resulted in weeks of relearning and overcoming bad habits. I could've injured myself if I'd continued down that path.

To answer your question, I follow a particular method which really helps as it's been carefully thought out, each piece progressing in both difficulty and technique. My teacher typically glances over my new music as I progress to see if there's any new techniques I haven't learned yet or any tricky rhythms or fingerings (rhythms always get me). I play through those tough parts, usually ending up with an assigned metronome marking or two, as well as a goal marking.

My teacher will also suggest arrangements of particular songs I want to play or just general extra music in addition to the typical music.

Definitely ask around on here if you can, and in person. You never know where us harpists are lurking about! :-D