Sorry if you were offended
If the horse is just nervous of your husband then all he can do is work on reassuring the horse that he's no threat to him and that can take time and it will take a lot of patience too. Unfortunately that's not something that can be taught over the internet
It will help your confidence if you ride a steady reliable horse for a while and that's the best advice anyone can give you
A young horse that's had a few weeks with a trainer is still a green horse and still has a lot to learn so having his education continued by someone who knows what they're doing will help him progress
Yes we were all beginners once - and I can't speak for anyone else here - I learnt to ride as a very young child but my first ponies were all very carefully chosen so they would be safe and help me to learn how to ride really well without the fears of them doing something dangerous.
For me the unbroken green horses came much further on down the line.
Hence my suggestion that you improve your riding on something sensible so you can then use that experience to keep this young horse on the right path