I'd suggest you do it if you have the means, time and finances to do so. Interestingly, it's NOT as difficult a language as you would think. The dreaded mutations of Welsh aren't as hard as you think, and you get used to them.
If you can, learn South Welsh. The Gogs talk weird and use a lot of English words and grammar, which is strange, because they speak more Welsh percentage wise, LOL. Plus it's prettier.
For example;
Mae o'n leicio coffi
Mae e'n hoffi coffi
He likes coffee (north, south)
They also have some really cool things like the concept of "nothing" in Welsh (dim) meaning "something", so it's lead to "dim yn dim" - "nothing of nothing" to mean "absolutely nothing".