Surgery done would be Arthroscopic Acl reconstruction with medial meniscus repair or meniscectomy. Repair is preferred as it saves your meniscus I agree with Dr Neeraj If meniscus repair with ACL reconstruction 6 weeks non weight bearing walking strictly with walker If meniscectomy with ACL reconstruction 2-3 weeks gradual increase in weight bearing Full walking without support in 1 month time.

Depemds on what surgery is planned and what is the post op physiotherapy you do If meniscectomy is done then  Independently with walker withing hopefully two days and using a stick maybe for 2-3 weeks and then you should be able to walk without stick after that but if meniscus repair is done then all this is postponed by six weeks