I think many of us have dealt with this question. My experience was initially returning after 6 weeks. I burned out after about 2 months. Then I took a month off and have returned part-time 3-4 hrs/day. Even this much is hard some weeks. I am working with an agency (Canadian) that is now recommending 3 hrs, 3 days per week and then gradually building up.

I think it really depends on the person. I am better to do a little, but keep the routine of going to work and mixing with people. If I stay home too long, I get introverted and lose my confidence. It's a personal thing for sure.

Good luck