An easy and 'free' route to cloth modelling is CLO's Jinny: https://connect.clo-set.com/jinny

You can load the .obj file of your figure there autofit  the template garments that come with it, or re-use models in their market place 'CLO.Connect'. There's ample free models available. Clothing can be edited.  

When loading the figure geometry .obj specify the xyz data are in feet and use an 860% scale. 

You can get the garment out by uploading your model to Connect and save a .fbx locally. Poser happily loads the .fbx as a prop, that you can save in the library. In Connect your model appears as a draft that you can delete. Set your figure to invisible before export/upload. The .fbx format is scale aware so you can import in Poser at 100%

Note: The conditions of use of CLO-Connect are a bit peculiar. Be sure to read and understand before you upload anything you are serious about.

The .fbx-es can be textured and decorated in Jinny. 

I have good experiences with this for 'quick and dirty' garments. I stopped saving them in the library, as it is usually easier and faster to make something dedicated for the project and then use it in the cloth room or throw a rig on it in the fitting room and fix thatever poke-thru with the morph brush.