Can you please guide me as to how I can convert a manually entered and baselined project into a Project template in Primavera 8.3.0

Without going into P6, I am almost certain that when you go to action>add project template, it gives you the option to copy from an existing project. You can select the project you manually entered and baselined and add it as a project template. My thought is that it's not going to carry over the baseline as each baseline is specific to the actual project and will not be a copied over feature. I will replicate for accuracy.