Central Europe trip advice!

I've done a lot of travelling so I wanted to try my first solo (at least for part of it) trip next summer and was starting to think about Central Europe. I was planning on going for around two weeks, with a very rough route of Krakow-Prague-Cesky Krumlow-Bratislava-Budapest-Ljubljana-Lake Bled - I'm pretty set on the countries. Was planning on mostly trains for travel and hostels for accomodation, trying to keep more budget. I would probably be going late June/early July time or late August/early September to avoid peak times. I like nature, hiking, history, food so most things would interest me. Would especially like advice for Slovakia because I know very little about it, but any advice would be welcome (especially if there's anywhere that's more unsafe as I'll be a solo female traveller). Thanks!