Agree with others on not tying her solid. Even older horses can be badly injured - not to mention mentally - by being tied & fighting it. On that note, I'd get her really good at leading & yielding to soft pressure before starting it. I also use a very long rope - at least 12' - wrapped around a rail, or if you don't have an appropriate horizontal rail, something like the 'Blocker Tie Ring', which will allow you to teach her to 'tie' but also allow her to back up without panic or injury. I always use a tie ring when floating horses too, for safety.
I think about the most important early lessons to teach a horse are about attitude. Build a good, trusting & respectful(on both ends of the lead) relationship with her. Teach her you're good to be around, that you & your tools & games are fun & lead to Good Stuff for her - make it worth her while. I therefore focus on using mostly positive reinforcement (rewards) in teaching.
Remember that horses have an extremely short span of association. That is, they need *instant* reinforcement for behaviours you want to effect. Even 3 seconds from the behaviour is too late generally. Lots of repetition is a key too. As is keeping it simple - isolate the parts of each behaviour you want & don't try to teach too many criteria at once, but get her good at all the 'ingredients' before combining them. Make the 'right' things easy by setting her up to make that response the most likely, to give her more 'practice' at being 'right' & getting reinforced for it.
Don't try to force her into things, but take it at her pace with what she's comfortable with. Trust is a huge & fragile issue with prey animals & 'baby steps' is generally the best. As well as the quickest in the long run IME. If you try to rush things, you generally end up with reactivity and negative attitude towards you, the tools, the 'games' you're teaching, which can be more difficult to get them over.
I personally am big on 'manners' first & foremost, as they're big beasties & are dangerous when they don't understand to stay out of your space, not walk into you, 'mug' you, not to treat you like another horse, for eg. Consistency is a huge part of this, and you need to be aware of what manners you want of her & to be utterly consistent never to allow 'bad' behaviours.
Do you have experienced people around you to help train her? I agree that it's important to have *good* hands on help if you don't know what you're doing, as it's easy to ruin a good thing very quickly with the wrong lessons.