Newbie: Only 10 days of history

Just keep a close eye on the Recorder database file (home-assistant_v2.db) size. It can grow exponentially if you don’t carefully exclude any entities you don’t need to keep. Lots of good information here, now that you know what words to search for. A good starting point is:

If you need long-term (archival) data, you may want to keep it external to HA. There are a number of ways to do that. Look around and ask specific questions here if you’re stuck.