That motherboard is.... ehh not good.
I you have to buy right now I'd suggest this:
PCPartPicker Part List
CPU: AMD Ryzen 5 3600 3.6 GHz 6-Core Processor ($174.99 @ Amazon)
Motherboard: Gigabyte B550M AORUS PRO Micro ATX AM4 Motherboard ($119.99 @ Amazon)
Memory: Crucial Ballistix 16 GB (2 x 8 GB) DDR4-3600 CL16 Memory ($71.99 @ Newegg)
Total: $366.97
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2020-09-30 18:08 EDT-0400
3600X was $60 more when I checked so it's not worth that price increase. You might be able to re-use your liquid cooler, it depends on which exact model it is. Maybe NZXT will send you a new AM4 bracket if you ask. Otherwise you might need a new CPU cooler as well, the one included with the 3600 is pretty bad.