First post. I started playing this game a few months ago and got frustrated, so I stopped. The last couple weeks I've started playing again. I created a sandbox world titled "TEST" which was exactly what it is. It basically was a "world" I could create and not have to feel bad about how poorly things worked or how many Kerbals I killed. Thus far my accomplishments have been: -Learning basic rocket building -Establishing orbits -Installing a few helpful mods -Learning to dock -Orbiting the Mun -Landing on the Moon -Rescuing stranded Kerbals in Munor orbit and returning them to Kerbal. I still feel like there are TONS to learn, but I feel so much more comfortable with what I'm doing and feel like I've gained the knowledge to continue my journey. My question is what else should I "Test" in the world before I move onto a new "real" one. Any tips or suggestions of things I should do next? Thanks in advance for the suggestions! PS: For those how are just learning to dock. It is the hardest thing I have had to learn. It takes time and patience to get it right, but it seemed like once I got it once, I could do it over and over again. I just watched about 5-6 different youtube videos on how to do it and put several hours into it.