Any breed of horse can be great for you.
It's not the breed of horse it's the horse its self and its temperament that you have to go by.
My first horse was/is an Arabian x andalusian gelding (14.3hh 4 years old, But now he's 9) he is the most quiet horse I've seen but he always gives you a challenge, he isn't brain dead .
My palomino Quarter Horse mare is so quiet she's had kids around her and sit on her and have pony rides yet she needs someone with a lot of experience.
I don't recommend first horses that are Thoroughbred or standardbred but that is my personal opinion I bet some of you are completely different.
Arabian x sounds like a good horse for you, they can go all day, good for long rides (they are used in endurance) and all sorts.
Even an Arabian x QH - Quarab.
Whatever suits you, don't always go with what other people say