Product help!

I'm 15 and interested in investing some money in korean skincare but have no experience and no idea where to start, so I was wondering if there are any recommended or must have korean skincare products out there? I currently use CeraVe cleansing gel + sunscreen moisturizer and the ordinary hyaluronic acid serum. I'm not the type who spends dozens on skincare (obviously) so if you have any recommendations I would prefer them to be in my budget! Thanks!! <3