Hi,
Prepare now for the solicitor's appointment, so that you don't forget to mention anything. As you write, you will probably remember further things that you might easily have not remembered. Start now writing things down. Begin with the dates of your relationship, the ages of your children, your ages, his name, his address, occupation, his criminal record etc, all of it. If you can remember dates, great. Save any relevant texts to show the solicitor. Write the wording of the texts down anyway. Write down what you can remember about any threats that he has made to you, or to anyone else about you. List any physical abuse of you or your child. It will not matter that you can't "prove" things. A judge will decide if what you are saying happened, is true. Most people who are abused and live in fear, have no independent "proof", because most bullies don't bully or threaten in public where there are potential witnesses. Give what you have written to your solicitor so that he has the facts and cannot then get things wrong. (Solicitors do get things wrong) . Ask for a photocopy of what you have written. You will save solicitor's time and you can be sure that he knows what you want to tell him, because he has it in front of him, in black and white. From now on keep a diary of your ex's behaviour or rather misbehaviour. Write down the time and the date. Use an exercise book as your diary. This diary then becomes your evidence, should you ever need it. Diaries are usually believed. If you write matters down soon after they happen, ( abusive telephone calls, threats, pushing and shoving, slaps, unexpected visits etc.,) you will not get confused about times and dates, if you ever have to give evidence in court.
Remember, you would not presume to tell him whom he may date. You know that you do not have the right to tell him what to do. In just the same way he has no right to interfere in your life. He is not your father, and you are not his child.
Good luck with the move and the studies. Can you keep your new address secret from him? Maybe his contact with your child with could take place at a contact centre, or handovers could. If you are really scared of him, have handovers take place in public places, such as outside the local police station. Get some one else to do handovers if possible, to avoid meeting him. Insist that all communication takes place through solicitors. Ignore texts. Change your number. Take control.
Good luck