To ask what you would do if you were me?

[HeyAssbutt]

Ok so bit of backstory. I'm 30, have dd(4), have been single since she was 3 months old. I've been working in childcare for 12 years. Now I've hit 30 I feel like I could take the next few years of my life one of two ways. I could go to uni next year to do bachelors degree in primary education. I've been to an open day and done lots of research and it's definitely doable. However, I also want another baby. I've been on lots of dates over the past 4 years and none have gone past about a month in. So I think I would like to save to go to a clinic for a sperm donor. Realistically it'll take me about 2 years to save as I work part time. My instinct says to save for a sperm donor now as I could do teaching later in my life but obviously it'll be more difficult to get pregnant the longer I wait.

So, if you were me, what would you honestly do? Any advice/experiences much appreciated

I would do the baby first, I think. Time passes quickly and you can train as a teacher later

I had my first baby at 33, after completing my PhD and having a stable job.
You have time for both, and I'd go with training first.
You may well end up having that baby and with a loving partner. Don't rush it just because you want another baby.

I would study first. You will then earn more for saving up for a second child and will be more stable financially for maternity leave when earning more. Plus you may meet someone in the meantime. You’re still very young. 10 years on and my advice would be the opposite but you have time. Plus studying as a lone parent of very young children is difficult, your DD is at a good age now but studying with a younger child will be more difficult. Likewise an older one actually as bedtime will be later so you’ll have less of an evening to study.

I would focus on your education, career, and the child you already have. Your financial security should be paramount over having another child as a single mother.
This is sensible advice