I started my girls around that age, they were both day time TT before 2, I think it is a great age to TT because they are so willing.
I think the key for me was that I always told them when I was going to the toilet and had an open door policy, toddlers that age usually watch and want to copy, so I had the potty next to the toilet or in the bathroom. Then I would ask them if they wanted to try and made a game out of it/or rather something fun and exciting to try. So it was never about racing them there or making them feel pressured, I'd just let them play with it.
Then I moved onto taking their nappies off totally during the day. So they quickly realised that needing to wee or poo meant they needed to go to the potty or toilet, or else it would go on the floor. The first few days it was all about accidents and I would do a "ohhh dear" hand on forehead expression with a smile. Then explain "oopsies, we can't do wee and poo on the floor" but all while smiling and making it a game. Then I would say "it's ok, lets clean it up" and we would clean it firstly just with toilet paper, putting the toilet paper in the toilet/potty and I would say "that's where the wee/poo goes! In there! Tell Mummy if you feel the wee/poo coming out and we can go on the toilet". So they quickly realised that to "win" at the game was to tell me they needed to go to the toilet and the accidents stopped within days, as this is all we concentrated on doing (kids learn fast!).
Then it was onto holding on in public or in the car, where they couldn't just say they needed to go and I would take them, they needed to learn how to hold on. I would explain in simple language that they didn't have a nappy on for this car trip. Then I would tell them where we are going, ie "remember you have no nappy. No nappy on your bottom honey, so if you do a wee it will go all over your seat!" Then let them digest that and go on to say "we are driving to Nanna's house. If you need to do a wee tell me, and you hold on, no wee's in the car because you have no nappy, we can do a wee at Nanna's house". Then if they yelled out "wee wee" in the car I would say "ok, almost at Nanna's house, remember you are holding onto your wee until we get to Nanna's toilet". We only had a handful of accidents when they would fall asleep in the car while needing to go, but we also live an hour away from most relatives so it was hard for them to hold! If they were awake they were very capable of holding on until we got there.
The same deal happened at the shops. At the grocery shops I would say before going in that there are no toilets in there so they need to hold on until we get home again. While clothes shopping I would tell them that they needed to tell me so that we could find a toilet.
I also did the Mum thing of knowing when they would usually go and preparing for it. Both are different to each other, but one will need to poo at least 3 times a day and I know the other one will poo once every 1-2 days. So in that sort of a way I planned things a little too, like not going grocery shopping when I knew DD2 would be doing a poo an hour after eating lunch etc. lol After a few months of being TT it didn't really matter as they could 100% hold on.
Night time TT is a lot harder and I *would* suggest waiting until they are ready, or until you have a lot of time to devote to it. DD2 got it before she was 2, as she is capable of waking up and going to the toilet in the middle of the night then going back to sleep, or of just holding on. DD1 (almost 4) can still have accidents because she drinks a lot, her bladder holds a lot and she is a deep sleeper. She won't even wake up if she wets the bed. For her it is more about making sure she isn't having a heap of fluid just before bed. I make sure she drinks as much water as possible during the day, then I don't offer it after dinner. (I give it if she asks, but don't offer).
Overall I did night time TT the same as going in the car or going shopping. Spent some time explaining that they needed to remember that they had no nappy on that night, and if they need to wee they can call out to me. In the morning with dry beds, it was a heap of praise. If they were wet, it was just not talked about (if they themselves didn't tell me), or I said "oh well that doesn't matter, let's go wash them" (if they did tell me or seem upset).