I can tell you how not to play as them. Do not skip buying a few CS's. I had thought trade could help close the gap. I was so very wrong, Monty taught me the error of my ways.
Now, I am loving them, so have been trying a few things. Do not even think going peity 1st, it also ends bad with someone wiping you out.
Here is what Is working for me. Open liberty, grab the worker, republic, MoV. Tradition full tree and form there whatever you want. I use the 1st mov for either 2 Cargo ships if I have a clean safe route. If not buy 2 carvans and a building, stone works if you have stone is best imho.
I have gave up trying for wonders in 1st age, to many missed it by 1-2 turns. I put everything in growth to gain science. Getting a GS is very needed for me, that extra science is needed. After that it is just a matter of buying 2-3 CS's and building your awesome trade network.