I feel the same way about my 9 month old and feel I'm in a similar position RE no Mama friends. My daughter is a calm baby and very smiley and happy to play on her own for 15 to 20 minutes while I catch up on chores/cook/do paperwork etc. She's not crawling but will turn on her tummy 360 so she can look round the room. If I stand her up she'll hold on and stand for ages but sometimes she'll get excited and just let go like she doesn't understand she'll fall. I have to catch her because we have wooden floors and even with a rug she'll bang herself hard.
Sometimes I think it's my fault because I'm not showing her properly or not giving her opportunities to practice or maybe I'm not pushing her enough... but then I don't want to pressurize my baby because of what other babies can do. I wondered why she wasn't trying to pull up and started pulling her hands so she'd start trying to standing up without me standing her up. It turns out she can and wants to stand up on her own, she just hasn't worked out that she can use furniture to do this too.
Babbling is a vague word. She says papa, caca, tsssss, agua, dada and makes funny noises in various tones... is that babbling? I watch videos of other babies her age and they look so much more confident with their movements. She is getting the hang of eating, today she picked up a lentil in pincher grip and got it to her mouth, things quite often don't get to her mouth though. I'm full of doubts as to whether both she and I are doing OK. I just have to calm myself by thinking and my baby is happy and healthy and I should be grateful for that. So she's not a early developer... Einstein didn't talk until he was 4.