No specific “rule of thumb”.
Try 1 -2 feeder sets / warup sets to “search your weight” for your rep range and go from there. I prefer to have week 1 as a set point in my program / logbook and progress from there. Specially when you are a beginner of less experienced trainee.
Remember progress can be made from reps, weight or form. (Don’t only focus on weight increases, form or depth is also a factor of progress)
Hope this covers your question a bit?