Hello, i will split up your questions with 1, 2 etc...
1 Keyboard issue
-> 1
The thing is, it might go from qwerty to qwertz or vica versa i think. There is a windows standart key kombination to trigger it, i think it is ALT + SHIFT, try it and if it doesnt change back then, google qwertz to qwerty.
2 Server issue
-> 2 The thing is, its not implementet yet. There is no history yet, or favorite. Join via friends or use the console to join.
example: joinToRemoteServer("IP:PORT","PASSWORD") or joinToRemoteServer("666.666.666.666:66666","Yeeehaw")
3 Lags
-> 3 Well, thats one question i cant really answere. Its alpha so i doubt its optimised for everything yet. Try to use different drivers (might be more helpful if i knew your PC setup...), and does it lag on "single player" too? Look for a server with -> Low Animal amount, only a few players, only few build structures etc and try it there.
4 Mining and Skills
-> 4 Well, you CANT mine stones at all. You have to use "Dig a tunnel" (or if its gravel "lower ground level" while you have a shovel equipped), and PICK equipped. (Digging needs Terraforming 60+ if i remember correctly).
Mining itself is not too hard. Search an ore vein and have fun mining. (You cant mine the ROOF or the FLOOR, you ahve to mine the sides i think).
For Wood Cutting. Forestry 60+ Lumberjacking (or what its called ^^' ) 30+ to open the CARPENTRY skill. With this you can saw out billets, boards and logs right away i think.
hopefully i could help you out a bit.
Best regards
Ontrose