It would depend on all the other unspoken implications of the change to universe that go along with me having teleportation ability, such as:
1. Do other people have this ability?
2. How does the ability work? Is it magic, or technology? What other magic or technology is also being added to the world in this scenario?
3. Details of its capabilities, e.g.: Can I do it at will? Does it affect me to do it? How frequently can I do it? How many times total can I do it? How reliable or dangerous is it? Does it cost any resource to use it? Are there any side-effects? Does in make noise or flashes of light or smoke or anything? How much weight or other people can I transport with it?
4. Is it possible for me to gift/reproduce/sell/lose this ability?
But, in general, the kind of answer I expect you want is:
1. I’d use it to travel a lot, if it involved notably less time/suffering/cost/etc than air travel currently does. If it’s super-easy, barely an inconvenience, I’d go everyplace I’d want to go for any reason, which is most places.
2. If I could take someone with me, I’d travel with other people, and take people where they want to go.
3. I’d consider the many ways this ability could be used for good, and carefully figure out how to do those things too. I’d try to figure out what the best risk/value strategy would be, and do that. It’s an interesting, complex problem – the sort of thing that comes up in fantasy role-playing games, as I’ve been playing for decades, so I could go on for a very very long time about that.
But I can’t help but mention again that the considerations I mentioned are crucial to what would really make sense to do, if this were a real situation. One needs to ask who else has this ability, and even if it’s only you, what the risks and side-effects are, because, for example:
1. If everyone, or many people, or even just any military types, can use this, there may be some serious worldwide chaos about to happen.
2. If only one, or a few people can use it, then those people need to be VERY worried about the military/government/oligarch types, who if they learn you have that ability, will want to figure out how to get that ability themselves, and who will be willing to do anything to you to try to achieve that.
3. Any huge shift in technology or magic abilities, implies there is a lot more going on than your one new ability, unless the universe really revolves around you. Even if this is just an ego fantasy, there would be much more to consider than where to visit.