I talked to a cousin of mine, who has two girls, less than two years a part, for advice on how to go about getting Miss A a toddler bed. Her best piece of advice- keep her involved in the process, the WHOLE TIME. That's exactly what I did, from explaining she would soon get a new bed, showing her different ones online and in the store, allowing her to choose which one she wanted, and showing her different bedding options. As soon as she saw Minnie it was hands down the winner and she wanted nothing else! We ordered her bed and bedding set from Amazon and were surprised at how quickly both arrived, as we don't have Amazon Prime.
When my husband put it together (which was pretty easy for him, we highly recommend it), she was there the whole time, handing him the screwdriver and pretending to screw thing in herself. :) She couldn't WAIT to get on it, even before we put the sheets on. We had to take down her crib in order to get it out of her room, and when this happened, it suddenly felt so real to me and I couldn't help but break down in tears.
She slept the whole night, didn't make a peep, despite my checking on her several times throughout the night. In the morning she woke up happy and excited, refusing to go downstairs for breakfast. It was only after I promised her we'd come right back upstairs that she reluctantly agreed to leave.
So my tips for making the switch- Keep your child involved, the entire time. Be excited about it, chalk it up as the greatest thing in the world. I also think having something she absolutely loves- Minnie- as her bedding set was the key. If you can pick out something together that they're excited about, hopefully it will go easier!
Oh and if you're wondering about naps, so far nothing has changed there. She's still not napping, and she is having quiet time, except now I find her with tons of toys on her bed. :)