Happened to me about 18months ago. I saw a physiotherapist privately & regularly.
Her advice was that I needed to keep on exercising, as the cartilage likes stress! But I didn't squat or run for about 9 months, and I'm still not running. I'm 66.
But I now jump - I do a Hyrox run through with my personal trainer every few months - but cycle 2000 metres rather than run 1000 metres in between each strength exercise - and I'm fine with burpee broad jumps now, as well as upside down burpees and sideways & backwards jumps.
I got back to pretty heavy deadlifting after about 6 months, but it was slow and steady - I'm now back to reaching new PBs in my lifting. Back squats still lighter, but I can move 50 kilos without my knee complaining, and I am very flexible (dancer training) so my squat depth is pretty deep. I play squats by ear because the flexion in the knee they require can be a bit taxing.
"Kneehab" was a lot of supported one-legged squats, a lot of slow step ups onto increasingly high plyo boxes, light barbell back squats (nothing over about 30 kilos), a lot of mobility and balance work - standing on one leg on a Bosu ball, and rolling down my spine to touch my shoelaces sort of thing.
I used a crutch for about 2 weeks after the tear, and a long tight support bandage (Boots sell lots of different types) and I still use various tightnesses of support bandage.
My personal trainer was amazing in keeping me on track and not despondent.
I also do a lot of walking, and I warm up well before a heavy training session - gets the sinovial fluid going.
It's slow but you should recover. And physiotherapists are the angels who walk this earth - mine was so reassuring.