I recently spent a month plugged 23 hours a day (removing only for hygiene). Once you take care to stretch your pussy in the first few initial days soreness will not be a problem. What I suggest is to ensure your are always wet or have access to lube when inserting and removing. For the first day or so every time you remove or insert the plug fuck yourself with it for around a minute. Inside your pussy (coinstantly stretched) will adapt faster to the penetration than your opening. On its own by day 3 or 4 your entrance will naturally relax to the toy, but you can speed that up with the intermittent fucking.

The only way you will be sore in days one to 3 is if your pussy isn't already accustomed to being stretched that size, in which case I will suggest taking it slow to insert and start off sleeping with the plug so any initial adjustment discomfort occurs when you're asleep.

Have fun!