I use fountain pens exclusively and take pride in my penmanship. I also love my Apple Pencil - it lets me use and practice my skills, and is a very good approximation of several different types of nibs. Even my older Wacom tablets weren’t as good.
Any tips on improving penmanship? Mine has always been absolutely horrible, which stinks as there's lots of things I prefer to write out by hand. Most things, in fact, unless it needs to be electronic.
A print hand lets you focus on correctness. Once you have some confidence, if you like, you can tackle another cursive hand, such as Spencer: https://en.wikipedia.org/wiki/Spencerian_script