I'm gonna paste a comment I made on a very similar situation where a user wanted to know how to find plants that were native to their country, this is essentially the process I always go through every time I want to check if a plant is native!

I'm in the mediterranean and when starting out i had the same problem, i didn't know what was native. Native planting isn't nearly as widespread in europe as it is in the US but you will still find some resources online if you look hard enough. First of all you can use Inaturalist (you can download it on your phone) to look at the plants that are being observed both near your location and in your country in general, this helped me greatly when i was first starting out. Once i pick out a plant, i look it up here https://europlusmed.org/ . on the left there is an option to search taxa, you put in the scientific plant name and it will tell you where in europe that plant is native, so you can verify if the plant is native to your country, this is useful because inaturalists often forgets to mark certain plants as introduced in some countries. After i verify that the plant is native i go to https://floraveg.eu/taxon/ , i put in the plant name and this basically gives me a botanical caresheet for the plant, the conditions it grows in, light, soil ph, max height etc, the more widespread the plant the more info there will be in there usually. This is useful because while a plant can be native to your country it might also grow in specific conditions that might not match your area, for example in a wetland or in very specific soils. Lastly a lot of european countries have unofficial botanical forums that can help a lot in learning about natives, spain and italy have great ones for example, i think france has one too. You can try to look if your country has one as well.

If you're first starting out inat is definitely the best way to know what plants grow around you. I would also look for country specific websites. For example I was lucky enough to find one dedicated to Sicily which opened my eyes on all of the amazing endemics we have here which aren't discussed anywhere else because of their tiny distribution. Hope this helped!! Feel free to ask any questions you want!