Divorced and been through court person here. Has your solicitor not advised you of how it works?
All assets are put in one pot. The starting divide is 50/50. A court will look at both your finances and indeed your individual needs and the division is more likely to be higher in your favour as you have a child. In my experience it is usually at the 60/40, 70/30 mark. However, this all depends on a multitude of things that you can't possibly cover here.
Child maintenance is not dealt with by the court. It is either private arrangement or through the CMS. Use the CMS calculator to see what you would receive based on your ex's earnings.
Spousal maintenance is not awarded for life (only in rare cases), and you work, therefore, I'd be surprised if you were awarded it at all. I can't see a case here for spousal at all.
In terms of child arrangements :
The usual arrangement is for the non resident parent to have the child every other weekend and one night midweek. If your ex were to take you to court, this is probably what he would be awarded. Yes, they do take wishes and feelings into account but they also base their decision on what is in the best interests of the child and maintaining a close relationship with the NRP.
If you can't manage on your one income and maintenance, then you will have to find a better job, see if you are entitled to some universal credit and indeed cut back and cut down.
My husband left me, emptied the bank accounts, sacked me from our business and left me with a 2 year old, completely penniless. When we got to court, I got a good settlement in terms of property but he pays £22 per week maintenance because he's self employed and just declares sod all to avoid paying. The court are not going to tell your ex off because he wants a divorce. They are not going to award on the basis of maintaining your lifestyle.
You need a better solicitor. Good luck.