Been a loan parent since my child was 2. It’s utterly exhausting! Getting easier now my son is 10.
You really do need support to raise a child - I don’t know how I would have done the baby years and night wakings and breastfeeding without a supportive husband.
If you were going to rely on a wider family support network I think you’d need to have explicit discussions with them beforehand about the kinds of help they’d be likely/willing to give you so you can go in eyes wide open.
I have a thread running on David Lloyd gyms right now as looking into joining - as a lone parent with a child there are very few options for having a social life and getting out of the house unless you have willing babysitters or can afford to pay for one. It’s frustrating at times not being able to step out of the house without arranging childcare. I can’t go to the gym, can’t go out for drinks after work, can’t join local meet up groups, find it difficult to find new friends eg on Bumble as the non-parents don’t want kids around and the parents want to find friends with similar aged kids. Dating is difficult - getting to know someone new means investing in babysitting time and I don’t want to bring men back for sex with my child in the house. Occasional work trips to London are a logistical nightmare as I have to book breakfast club which doesn’t open til 8am so I have to apologise for being late, then find evening childcare who’s willing/able to do the after school club run and bring my boy home and look after him for the evening.
Just think through what you do now and how you would logistically arrange/afford everything in future, because it’s a pretty lonely life unless you’re really well off or have very willing family to help.
I think the point a pp made about children needing a dad is moot - children need mothering and fathering, which is traditionally provided in a sex segregated way, mothering qualities by a female mother and fathering qualities by a male father. But I think if you’re a well rounded and emotionally developed person (i.e. a woman in touch with her traditionally masculine qualities like leadership, adventuring, forging paths into the world) or a man in touch with his traditionally feminine qualities (being, stillness, emotionally aware), then there’s no reason why a child wouldn’t end up getting a well rounded parenting experience. If you have doubts and can afford it psychotherapy is a good way to explore that and round yourself out.