If you're just starting out, it might be a good idea to start with basic materials: polishes, bases, tops, manicure tools. I recently discovered
https://nailmastershop.com/en/pnb/ , they have a wide range and good quality products. I particularly liked the lacquers and gels from PNB, they are easy to apply and have good staying power. The prices at NailMasterShop are quite varied. They offer products in different price ranges, so you can find something for both the more frugal option and those who are willing to invest in more professional products. I usually go for something in the middle price range and am always satisfied with the quality.