I've been able to read music since early childhood: so switching to MuseScore wasn't such a big deal for me.
The challenging part was learning to write for orchestra, when it's going to be played by actual musicians.
I was much more familiar with piano scores; but for an orchestral score, you have to understand the nuances of all the different instruments. Otherwise your score may be unplayable, or very difficult to read.
(E.g. Understanding which pitch slides can be played on a trombone, or how to notate different playing styles in the strings.)
As a sheet music novice, you won't find it quick or easy to learn; but I would encourage you to do it.
Like learning a second language, it's always going to be a useful skill.
You can probably get everything you need from You Tube and Wikipedia; but it may take several years to become proficient.
Since you obviously have a natural flair for composition, I would say it's worth the effort.
Good luck!
Alex