In my experience a young adult cat is going to fight you on new things that it isn't used to. Unfortunately this will often come down to a case by case basis, but as my sister once had a hairless sphinx I know that cats will generally become accustomed to things. Don't expect it to ever come around to loving the harness, but more than likely after it sees that you're putting on the harness to take it outside it wont fight to much. The real secret with that will be figuring out if she enjoys being walked. If she likes going outside then she'll probably deal with it, however if she decides to be strictly 'inside' then you're just putting her in a harness she doesn't like to take her to a place she doesn't want to be.

Other tips for new cat owners. Do not pet their belly. When they present it, they are just stretching their back. Cats fight and kill via clamping on with their front paws and slashing with the bottom to disembowel the other creature. So when you touch the tummy you're sending 'you are being killed' signals to the cat. Instead the best place is around the cheek and just behind the whiskers on the face to give little rubs to.

Good luck on cat ownership.

Other good spots for kitty scritchies:
- under the chin;
- just inside the ears;
- between the shoulder blades, the one place no mammal can reach, (without tools);
- base of the tail, (beware of their reaction though);
- stroking the back.

...If a cat trusts you enough, you can gently rub their chest and maybe their tummy. However, that kind of trust is hard to earn and takes plenty of time!

I've heard that it helps to get them more accustomed to it and have them believe it's a good thing. So like put in on her, give her a treat, take it off. wait a bit, put it on her, give her a treat, eave it on a bit, take it off.

You know that kinda thing

if you get them accustomed when they are young, it is possible, but mostly, cats will hate it and will not cooperate. they are not like dogs.

ive had cats all growing up and would never walk them. my current cat is indoors and she seems to just kinda exercise herself in the house. i dont think you should worry too much, but if you do decide to walk her she probably wont like it and it will take a long while for her to get accustomed to it

Go slowly! Start by letting her sniff the harness, even play with it she wants to. When she's used to it, lay it over her back, then give her a treat, then take it off, then repeat the sequence two or three times. Do this every day until she'll let you do it without the treats. It might help to click a clicker when she's being good about accepting the harness. Then try putting it on her. Again, using the clicker to tell her that she's earned a treat might help. The point is to take it slowly.