Tagalog. Main language. Tulog means sleep in Tagalog. ☺Brush up on your Tulog, or anyone of the 700 local dialects....
And yes, there are multiple dialects. Although some dialects are already considered languages because of vast differences. Tagalog, Kapampangan, Ilonggo, Bisaya, Ilocano, etc. I can't speak some well but I can understand about 3-4 of them enough to get by.
My Tagalog is on par with my English though.
It really depends where you will be setting up and how easy it is to get supplies from the nearest town or bayan. If there's constant electricity, or easily accessible water. If you will be in a farming town with a good community and you're willing to sacrifice and put in hard work to till the land, it can be rewarding.
The good thing with the climate is that it's tropical. Meaning that temps are moremor less consistent and a lot of crops are year round.
Rice is the staple as are sweet potatoes. Food is very hearty and good.
The major cities are definitely modern and can compete with the rest of the world in some infrastructure and things to do. The provinces are different.
Good luck with your plan and stay safe.