You need to increase your budget, it is not enough to fit all the components.
22" - 24" IPS monitor - around RM 500
Ryzen 5 1400 - around RM 800 (cheapest available Ryzen CPU in Malaysia now)
RX460 2GB - around RM 550 (cheapest RX400 series)
As you can see, the total cost is already nearly 2k with just 3 items in the cart
If you buy a 240GB SSD in the future and you have a 1TB HDD with 800GB of files then you need to choose which files to migrate over to the new SSD, or just format the whole PC again (this is recommended to reduce the chance of having symlinks issue after data migration).
Regarding the CPU, it depends on games, some games don't require i5 to run smoothly but some do, i5 is a safer bet in this case (you can downgrade to i5 7400/7500 to save cost, they are very close in terms of performance).
And also listed the complete ryzen 5 ( minimum budget ) rig. TQ and sorry if too much question.