First time building a PC and this is what I am planning to buy:

Motherboard - MSI Pro Z690 A Wifi DDR4 (RM1133)

CPU - Intel Core i5-12600K (RM1318)

SSD - Kingston A2000 1TB (RM416)

GPU - ASUS TUF GAMING RTX3070 OC (RM2869)

RAM - G.SKILL Trident Z NEO 2x8GB 3600 MHZ (RM458)

PSU - SEASONIC Focus+ GX750 80+ Gold (RM645)

CPU Cooler - be quiet! PURE ROCK 2 BLACK (RM188)

Casing Fan - ARCTIC P12 PWM PST x3 (RM126)

PC Case - Corsair 4000D Airflow Tempered Glass Mid-Tower ATX Case (RM309)

Monitor - GIGABYTE M27Q (RM1318)

Total - RM8780

I have the following questions
1. Where should I buy these items, currently I am planning to buy them from Shopee/Lazada,
2. Is this is a decent build? Anything that I can replace to improve on it?