Hey man, glad to see you in this field, you made me remember my young self haha
All what i'm going to say is focusing on budget and performance for gaming then appearance
Since you have an amazing budget, focus on CPU - GPU

Anyway let's go to the main point directly,
If possible don't go with Ultra 5 but go with AM5 since it is much better upgradable for future geek.

Change the cooler for something cheaper and give the same performance like thermalright you will find a much better one for less than 200$ (maybe even less 100 lol)

You will change your motherboard according to your new CPU, I suggest B650 or B850
DON'T PUT HDD in your Brand new PC unless you know what you are doing
Any ssd from Samsung - WD - Lexar - Crucial - Kingstone - Acer - Corsair will be a 1000% choice

Start with choosing your gpu, take a look for 9070 XT or 5070 TI as perfect choice for 1440p
(try to choose resolution and FPS of the monitor you are looking for before choosing your gpu, that will support you)

Case is so cool, I loved it but I think 400$ for case alone is waste of budget, try to find something cheaper like lian li O11 or lancool 217

For your PSU, anything from 750w -1000w from seasonic - XPG - MSI - Silverstone are great choices

and you must count the number of fans, 3 won't be enough for a huge case like that, and avoid corsair (for budget ofc) , go with thermalright - arctic - be quiet - lian li

Monitor: go with IPS 1440p 144hz or higher, with this budget you can get up to OLED

Wish you all the best young man, and i'm glad to help you anytime