I think this is a somewhat inevitable part of making things 😅 it’s always going to be more of a struggle than buying a barometer and thermometer yourself. And it’s important to understand that you are making something, it takes a longer than you expected, it will break, it is difficult to predict the costs (especially if it’s your first project).
With that said: it IS cheap! Although you may end up buying a small screen, a pico, and other parts, I’d say the amount of pleasure you get is well worth it.
If what you want is a thermometer/barometer, then you should get one on amazon. What you have bought is a project 🥰
Also, check this post Solar powered esp32
And this post: Pico with BME280 breakout (via Explorer Base and MicroPython) - #11 by dryfish
And do a little exploration. You’ll get it!