Take it slow, maybe ride inside first or lunge your horse to let it lose some energy first. My mare gets excited when riding out, so I like to ride her inside for 15-20mins first, and then go out.
Just give your horse confidence. If your not sure, then it will be hard for him to be sure.
Hope it was a handy tip.
My advice would be to have another horse with you because horses don’t usually bolt from another horse and also to make sure you talk to your because I know when I’m out in a field I like talking to my horse
just introduce the field to her slowly so, just hand walk her, or you could let her out in the outdoor/field if it has a fence just to see how she reacts.. i hope i could help..
You could hand walk her in the field or outside arena to let her see everything before you are on her out there. Let her see everything, if she has to stop for a while and look at one thing, that is okay. Devote a little while to just walking all over where you would be riding, and let her check it all out. Then, maybe a day or two later, ride her there. I would walk her along the perimeter of the area you would be riding in before you get on. Take it slow and let her stop and look at something if she needs to. Then, just do what you are comfortable with for the day. I would slowly build up, but reach for a little bit more every ride. If, for some reason, she does buck and bolt, I would talk to her and let her know everything is fine, but make sure to continue riding. Don’t let her know that if she does that she gets the day off. Then, she would constantly do it. Don’t be afraid to be firm with her, but also remember she is scared, so talk to her quietly. Kinda how your mom would if you were scared to reassure you everything is okay. The least you could do is walk, and if that is what you feel comfortable with the first day, that is okay, but don’t let your nerves get the best of you. So keep on doing more and more. Hope I could help!
I think, you should keep calm and go for a ride with somebody (then your horse will see that other horses don't get nervous). Just ride as always, you don't have to gallop on the first ride. You can also show your horse the surroundings before riding :)