[OUTREACHY] Permission To Work On Tasks

So I went through this link
https://github.com/gitgitgadget/git/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22
 and I found two issues that interest me.

First issue is here https://github.com/gitgitgadget/git/issues/635 , involving changing the "die()" error msg outputs to all lowercase. I found a few files here https://github.com/git/git/tree/master/builtin where the "die()" error msg had some uppercase in them (add.c in lines 185, 203, 205, 211 and 571) (branch.c in lines 521, 525, 581, 597, 599, 627, 629, 643, 650, 652, 776, 926, 954 and 968). If I'm allowed to work on this issue, how many files should I edit? The last closed issues related to this issue had edited five files.

Second issue is this https://github.com/gitgitgadget/git/issues/302 . Is it still available to be worked on? I notice it was opened in 2019