Question Help upgrading Aspire XC-780

[Eijar]

Hi I need help upgrading this mini pc....
First its case..
Second psu..
Third memory..
Fourth gpu..
And last is storage.

Specs:
Cpu: 7th gen Intel i3 -7100
Memory: adata 288 pin 1x4gb 2400mhz ddr4
Gpu : integrated graphics intel hd630 ( i want to buy 1050ti)
Psu: 300 Watts
Storage :: 1tb Toshiba hdd


Yep at first i need a good case (budget case is recommended) because i cant upgrade my psu the case i have now is pretty compact....so i need some help/recommendations about the case

2nd psu.....Yes i read some threads there that i need around 400+watts to run 1050ti... Any recommendations??? Yep i wont budget the psu...

3rd memory... Yes i did some research about the memory of adata 4gb ddr4 2400mhz....But i can't find similar to that so i need to buy new memory and replace it...... 2x4gb is okay but i want 2x8gb ddr4 2400hz memory
..So can someone recommend me budget friendly

4th as i said up there i want to buy 1050ti (oc not recommended) use only on light to medium gaming ...

5th storage
.... Yep when i open the case i saw it has m.2 slot so and good recommendation about that and i have optical drive but i dont use it and i want to replace it an ssd...1tb ssd and 250 gb m.2 for system boot

 

[Eijar]

Btw i dont know what is the motherboard... Its an acer thats only i know and i think its an micro atx
1pcie slot
5usb port(1 3rdgen, 4second gen)
2hdmi port and no vga port