I am so sorry for your loss. I can totally relate, and it is devastating. I know how it feels to want to hurry up an try again- when it happened to me, I felt like I'd lost a lot of time I invested into the pregnancy and then I felt behind somehow! There are, however, a few reasons you may want to wait until after you have your first af to try again.
No matter what you decide, you may want to check out this website: https://www.pregnancyloss.info/waitingforaf.htm It really helped me to know what I might expect for my first af- because I had no clue when or how much blood might be on the way. It turned out to be not that bad, and my next cycle was more regular than it has ever been before (28 days, O'd on day 15- that's never happened before!). Anyway-wishing you the best of luck in this journey!