Take your time. Also build up and then out. Meaning plan ahead and just don't follow the installation steps in order and don't be adding parts that you will have to reach over or through when adding other parts. Add the railings to the superstructure parts as you assemble them. They are much easier to add while sitting on the bench than on the ship. I do the railings for the deck and rigging last. I also use epoxy glue if the main and secondary mast is made up of metal and plastic. It is much stronger than CA glue when putting the mast and yardarms under tension when doing the rigging.
If you want the paint to look faded as if the ship as been to sea for a while dilute the paint with about 18% white paint.
Enjoy