Finally, after 8 years, I would like to return to the music, to my big desire - the trombone

For over 18 years I played trumpet in a brass orchestra and a big band, I have always wanted to play either trumpet or trombone.
A couple of years ago I got seriously ill and I was forced to leave the music ,I recovered after a hard fight and 2 years of hospital, everthing went smooth thanks God. And now of course, I really want to go back to the music.
I decided to switch trumpet with trombone,a wish from my childhood, preferably a bass trombone or a tenor with a quarter valve (for lower section)
Please advice, where to start, which trombone would you advise me up to a budget of 2000 EUR (around 2400 USD) ??
What literature would you recommend to me? Conductor of my orchestra. he will be happy to help me. at least that's what he says.
I would prefer a bass trombone but reading the forums on this website, I see that it is not recommended to start with a bass trombone. what do you think ?
Many thanks to everyone
P.S. sorry for my english
