If you have just began to learn catia or any other cad software then
go for quantity. Do as many models as you can. Aim to do cad model as
many items as you can.
Don't worry about the results, keep churning the models and in each
iteration follow the process, learn a specific technique.
Let's say you learnt about lofting today, then aim to employee this
technique and bring out as many cad models you can. Make it as a
personal challenge to see how many models you can create with all the
techniques you have learnt so far.
Just create and don't worry about the quality for now. Most of your
models will be useless, crap but their purpose is not to get a world
changing model but to teach you the software.
This is the easiest and the fastest way to learn a cad sofware. Sure
its lot of work but hey who told something worth acheiving will be
easy. So try it.