You should not use your initial resources to build ships in the game. Building warships in OGame uses up too many resources that can be better applied to defenses in the beginning of the game. Start with rockets and lasers as your initial defenses and get a shield built too. If you start building small fighters you can lose them to a larger fleet and the resources you put into the ships will just go to waste. Put all your resources into technology upgrades and defenses before you think about ship building. Also think about joining an alliance at this time so you can be protected while you build up your colony. Once you have a good defense built up it is time to build ships.
Before you start to build your military ships you should get a colony ship built. Make sure you have the technology requirements for it by clicking on the tech-tree icon and checking what you need to upgrade. Ships require large amounts of resources and without another colony you just won’t have enough resources coming in. On your second colony build resource mines, power, and some defenses. Once you start producing resources, ship them to your stronger planet and start constructing military ships. Build small cargoes first and then move up to the larger ones. If you do the tutorial you will get several cargo ships as a reward so make use of it.
Small Cargo - This civilian ship is your transport workhorse. Use the small cargo to move resources back and fort between colonies once you have another planet established. Each small cargo can hold 5,000 units of resources.
Large Cargo - This transport ship is a significant upgrade from your small cargo ship. The large cargo holds 25,000 units of resources. Use the large cargo to helps your empire expand and grow.
Recycler - Eventually you will find yourself in a battle and after a victory you will find debris that can be picked up by using the recycler ship. This civilian ship has a cargo space of 20,000. Recyclers should be brought with your fleet to clean up the debris fields after space battles so you don’t lose the valuable resources.
Espionage Probe - This small ship is used to spy on your enemies and to explore the galaxy. They are very weak and are easily destroyed by opposing fleets. Empires should send probes on a consistent basis to gather data.
Solar Satellite - This orbits your planet and provides energy for your ground structures. The solar satellite is very weak and is easily destroyed by a fleet. Use solar ground-based power until you have an established fleet to protect your satellites.
Colony Ship - This ship is used to expand your empire which will transform into a ground station and supply your new colony with initial resources to get started. Upgrading the astrophysics technology will allow you to have up to nine additional colonies. This ship requires extra deuterium fuel reserves to fly longer distances. The colony ship is very weak and needs to be protected by fleets.