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