4.8w/kg, go race!
The best strategy I can think of is to go race, try, learn, race again. Strategy often goes out the window in the heat of the moment.
There’s a podcast episode (if I can easily find the ep# I’ll post it here) which discusses a very very light rider and some race strategies they might choose to employ.
Put yourself out there and see what happens, then do it again and again. It sounds like these would be your first crit races - if so, I think your main limiter might be bike handling in groups and putting yourself into position.
Otherwise, you could always just go to the same races that Nate does and sit in his draft until the sprint. 