If you don't want to build a spacecraft, you can use this 3-stage spacecraft. It even has side boosters!

HOW TO USE
Start the engines and liftoff! To detach the boosters, interact with the 2 seperators on the side. There are small engines on the boosters to pull them away, but they sometimes cause explosions!

Stage the rocket again to unfurl the second stage! Pull it away manually, because the rocket can explode if you light a stage close to another!

Finally, you can release the lander, and fly around! Press LEFT ALT to toggle Capsule engines, and press "," and "." to turn the lander.

There is a LAUNCH ESCAPE system included at the top, to escape an exploding rocket! Make sure to detach this Escape System when your launch is a success. Just detach the Capsule and then activate the little 2 engines to escape with your astronaut alive! Use capsule engines to land safely!

Get it now: https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2896502783