I have been mining with 1 GPU for about two months and it's profitable when I crunch the numbers, about a whopping $8 - $9 a month.
Best advice I can give you is think long term; it's a slow grind. Now's not the time to invest any money into it. I already had a gaming PC with a GTX 1060 6 Gig card that I barely use so it's just the cost of electricity for me. Find a coin you like and mine it; plan on holding it for several months or longer and hopefully the value will go up and you can make some $$$.
One suggestion I hear sometimes with 1 or 2 gpus is to beat the bushes for the next coin that will have some kind of pump, jump in early when you can get a few, then sell high. Easier said than done, but I did make it work with zclassic and I believe many have with ravencoin, sure there are others. Speculative mining--just a game, really, if you already have the gpu. Takes some pressure off to generate steady substantial income.