Learning to write with my 'right' hand

Dear all,
To make a long story very short: I'm what the french call a 'gaucher contrarié' as in a left-handed person who was forced to write right-handed.

Turning 30 this year, I decided to say heck that and want to totally re-learn writing with my left hand.
I have a few questions:
- Has anyone here done this before and do you have any tips/feedback on the process?
- Can I keep using fountain pens as that's pretty much all I ever use?
- Do you have any recommended method considering I would love to write in cursive?
- Any other advice welcome

Thank you for your time and help