One thing you can basicly do in the beginning is to get 1-2 scouts and 1 colonizer (so that it starts charging up antimatter) and put them on exploring, get about 5-7 light frigates and buy about 200 or more crystal from the blackmarket before everyone else so you pay the least. Go forth conquering the first asteroid in sight if one is adjecent to your home(and building resource extractors first) and then a hot or cold spacerock as you build/research the prerequisites research techs to colonize in these respective enviroments (micromanage your frigates, if it get too close to dieing send it to a nearby star system and have it come back right away). Now the 200 crystal you bought are a good investment as your gonna build yourself a capital ship yard to build you a free capital ship to assist in capturing a desert/terran one if you can get there fast enough. (You dont warp in your colonizer untill it is safe to do so). You may want to get a second colonizer or scout (depending on which one of those of your race can capture resource extractors) and send them out to asteroid belts (without a big planet in the middle) to take the resource extractors, for more metal/crystal.
From henceforth some people opt not to build any more light frigates but instead go straight for their next best fighting frigate like the advent illuminator or a second capital ship. I upgrade my fleet tech a bit. With other alternatives i have not experimented. What you decide to do from that point i won´t tell you right now, there are many possibilities. What you'r gonna do depends on all the factors. In a 1v1 on a small map you can choose to rush, but in a 4v4 with random allies this is not usually a good idea.
The most important is that you are improving yourself and this is by itself the most fun/rewarding too as it creation/creativity that brings joy forth and it is this from which we are, so we enjoy to create. Creativity has some pretty creative ways of expressing itself, including in ways you dont recognize, such as improving your strategic/management/foresight/intuitive/precognition skills or coming up with new strategies or variations (improvements) on old ones. It may seem like a laberous road to do so, but it makes it all fun in the end and you (or anyone else) wont later beat yourself up for not improving, because you did.