Welcome to the forum.
While it is useful to know which models you have available in your collection, it would be much easier to help you if you were to post an army list, with an accompanying explanation with how you intend to use it, and the opposing armies which you are likely to face. For further details about army list posting, please look
here.
Looking at your model collection, you don't have a lot of options, so at the moment you're constrained to putting together a small infantry list, which is likely to be hampered by a lack of mobile units, and insufficient troops. You may wish, therefore, to consider investing in more troops, and the possibility of Wave Serpent transports.