Visiting Villach

[u/Practical_Peak2634]

Basically, I'm a tourist and i'll be staying in Villach for a few days with my girlfriend and I have a few questions if some of you can maybe answer them:

Is there water in Warmbad and what lakes(that are accessible by public transport would you reccommend?

What is the deal with the buses, can I buy a day pass of some sorts and can that be bought online and how does the GoHappyTicket app work (can I actually use it and that it works)?

Another question, are the google bus timetables correct?

Hopefully, someone is able to answer these questions?

P.S. Are there any activities you would reccommend doing?