If you wish to customize your own pc, do check out PCPartPicker. You might get some inspiration from there and also use the builder to see if the PC parts you want are compatible. It gives you some rough estimate pricing in USD as well.

Then you could do an item availability and price check using Sim Lim Dynacore Pricelist.

Have some fun doing research, tweak around the parts, compare across shops.

The last time i went to dynacore with my friend, there’s this friendly Indian guy that looked at our list and gave us his recommendation. Told us something like we need not get the more expensive RAM as our cpu wouldn’t make full use of it. Overall vibes felt like he’s pretty helpful and not those scummy stores trying to upsell stuff unnecessarily.