My eldest started nursery at 10 months, going full time five days a week, and my youngest is due to start next month, also at 10 months. My daughter settled amazingly - not a single tear was shed, but I feel like that's as much down to her personality as to anything we did or didn't do. But for what it's worth...
Starting a few weeks before, we'd walk by the nursery most days and we'd stop in front of it and I'd tell her what nursery was, what she'd be doing there, and all the reasons it would be fun. Sometimes we went in the morning and I'd narrate the drop off process, sometimes in the afternoon and I'd show her the parents picking up the kids, and sometimes just in the middle of the day. I wanted her to get familiar with the location so on her first day she'd have a sense of where she was!
We didn't make a big deal talking about going to nursery a lot as we didn't want her to feel like it was a huge thing looming in the future, but when we did talk about it it was all framed positively, e.g. "You're going to meet new kids and grown ups to play with, there will be new toys, you can make art!" etc, as opposed to "You might be a bit sad and miss mummy and daddy, but don't worry, we'll be back before you know it..." We just didn't even let the idea of it being sad/scary enter her head.
This was helped by the fact that we were genuinely excited for her to go to nursery. We knew she'd love it so we didn't feel sad or stressed or anxious or upset. We were definitely a bit emotional as it was a milestone for our first baby, but at drop off there was no stress or tears from us, just a smile and a wave.
The nursery also had a great settling in programme stretched over two weeks, starting with a 20-minute session and then building up to the full day. As it was still Covid era we had to just drop her off at the door from day one, but frankly I feel like it worked better that way - no time to hang about! In fact, when my son starts settling in next month I'm now able to attend the first sessions, but I'm tempted not to since everything seemed to work fine when I wasn't there!
Whatever happens, best of luck! Even if the settling period is a bit of a challenge, most kids go on to enjoy it :)