Hey Dimi, the gear you mention all see like good choices.
Regarding goggles, Skyzone 04x seem to be the new standard and I think similar price to HDO2.
2.4ghz and 5.8ghz play well together, in fact this is the standard setup for 99% of FPV folks.
One thing I’ll mention if budget is a real concern, check your local classifieds. If in the USA for example search Craigslist. I’ve bought almost all my gear used, for half price and never had a bad experience. A ton of people start in this hobby, spend a bunch of money, and then either upgrade or quit for various reasons.
Goggles like HDOs and Skyzone 04x have HDMI inputs which means you could upgrade from analog to HDZERO eventually. Though a lot of people have had the HDMI ports fail on the HDO2 goggles, so again the 04X seem like a better choice.
Long response, but hopefully helpful. Cheers!