need new computer for video and photo editing DSLR camera capable for making films amd recording music

Take it from someone who is retired after a successful business career:

You will never succeed in life if you're too lazy to do your own homework; get off this forum, do some research and find out for YOURSELF how to satisfy your passions - THEN fulfill them on your own.

Because otherwise, instead of a promising tommorow you'll only end up with a long string of empty yesterdays.

This.
Also if you are paying for time, it is worth spending on hardware, if your learning, buy end of line hardware and learn about other operating systems. GLP is not the place to ask for advice on computer hardware or software. Good luck.

Any computer with at least 3 Gb of RAM and a dual-core processor should be adequate for that -- no need to get something expensive -- only "gamers" need that

Ubuntu Studio-open source digital editing suite