Yes correct. You can do all these things and much more with a RaspiBlitz node

Check out the link on how to setup here👇
https://docs.raspiblitz.org/docs/category/raspiblitz-setup

Very easy to do.
Summary
1) get all hardware (pi, SD card, 2TB SSD, etc.)
2) download balena etcher (to flash SD card)
3) download the lastest raspiblitz release
4) flash raspiblitz release to SD card via the etcher program 
5) plug everything in to raspberry pi
6) turn on
7) go through setup & IBD 

 good. and can I do all these thing at the same time / running in parallel ? 

 Yes absolutely.