The others pretty much covered it with sealing but just to let you know for future reference that if you’re going for a glossy finish then any small imperfection needs to be fixed before paint is applied. Anything that you can see or feel in primer stages will show once the surface is glossy (it will probably even show without a clearcoat applied), paint will not fill any imperfections and gloss will just amplify them.
And Shimmerman said to let it dry to the touch between coats but make you sure you don’t leave them to dry too long. It’s called flash time and it’s the time between coats which is usually 5-10 minutes (depending on the thickness). This is the time in which you can apply another coat without having to sand the old coat so the new coat adheres. You can leave them more than 5-10 minutes but don’t leave them like an hour otherwise you’ll have to wait for it to completely dry (a few hours) and then sand it again before applying the next coat. Dry to the touch doesn’t mean touch it btw, it will still be a little tacky and may get contaminated or get ridges from your finger. Just look at it and make sure there are no glossy parts on the surface (ie: no parts that look wet).
Finally, I guess you don’t need to worry about how thick you apply the coats since you’re on a roller. If you do get to spray it then thinner is usually better for sealing and is called applying it semi-wet. It’s just a mist and you can see the previous color through. Thicker is better for filling and is called applying it wet.
Hope it works out for you.