Believe it or not, I trained and learned most of the trade myself by hand. But I have no certifications nor experience to work on "big data" systems.
Small data = less than 5 servers, single databases, single systems
big data = multiclustered (multiple servers farms), monstrously huge databases spanning multiple servers and even serverfarms, multi systems and multi nodes connecting and serving billions of hits per day.
But thanks for thinking about me and the vote of confidence lol.
as for your computer, your son should buy a hard disk dock. This allows you to connect a computer externally.
This way you can CLONE your older hard disk on to the new one.. and you do not need to reinstall anything.
Of course, reinstalling makes everything more efficient. But you lose all your personal files if you made no backup (and the old hard disk might die any moment, making you lose everything).