Our neighbor had her maniscus fixed about two years ago. Being only 37, I thought being on crutches for 6 weeks was a long time. She did therapy, etc. Even today, you can tell when she's been on it too long, she develops a limp and she also says she is now a weather forcaster. She walks every evening that she can.
Another friend, 53 had her's done two years ago, last year she had to have a complete knee replacement. Some work, some don't, all did the therapy, etc. The knee replacement is also giving her severe pain at times still and restless leg syndrome is now occuring in that leg. So she's not a happy camper either.
Others have had knee surgeries of some kind in our realm of friends. Just watch the pain killers, you can become addicted. Advil seems to be the pill of choice for most people we know. So a month is not nearly long enough to be recovered from this surgery and if your surgeon told you that, I believe he/she misspoke. So try to stay optimistic and and keep active as you can. It is NOT an instant repair and takes some time to completely heal. Wishing you all the best in that happening quickly.