Not set. Just go as heavy as you can go. I started with 155, now it's up to 164 as my 2RM. Sometimes I only manage 158 or whatever.
If you can get to about 10-15kg thats good. If not work on it, it'll improve. My 2RM was terrible before.
Expect to PB every 2-3 weeks imo. You WILL have some poor sessions in those 2-3 weeks but you'll get that one day where your ON IT and you'll hit it all for a new PB. 1-2kg but it adds up. 1-2kg every 2-3 weeks is a very healthy 18-26kg per year