Hey Holly!
great for getting involved! I recommend joining the Arborists team and jumping in!
I know that we are working through the "proposed by Matchbot," to look at the error rate, so please do not approve those, but those that are proposed by other people can be approved.
Make sure to 1) Clean up the profiles of the people you are merging, and 2) go through the merging and matching tools when done, to make sure all the merges are proposed/finished along those lines.
I do recommend looking at the proposed merges of those surnames in your tree before jumping into the big pool :) You can find your surname list under "My Wikitree." You may find some new relatives :)