My deepest heartfelt sympathy.
I learned many long years ago that feelings are never right or wrong, they just are, and working through them is hard work.
Your timeframe will be your own. Of course he will be proud of you, and you should be proud of yourself. Just getting out of bed is major many days. Does working as an RN immediately make a notable difference to you financially? If not, may a little slack for yourself is warranted, and OK. If you feel your edge will be lost academically, then plow through and take the test., You can always repeat it. You are going to get through this, one baby step at at a time. Some days are giant steps forward, some days you go backwards. At the end, you will be an RN!
Take good care and feel free to PM if you need to