Application for _Coolduck_

In-game name: 
Why are you interested in joining this server?: 
Hey, I was just being me and all until I was all like WHOA MINECRAFT, and then I went to go check on my account and I saw a lot had changed, prior to that I watched a Youtuber named Mumbo Jumbo who did Redstone Creations, and back to when 1.10 (I think) was released, I had a pretty good understanding for redstone and basic commands (such as Tile Drops.) So to sum everything up I just wanna polish up on some of the new concepts for old times sake, a lot of stuff is confusing right now, like how observers work, help would be appreciated. Thanks for readin :P
Current Redstone knowledge: 
Slight knowledge of comparators (used to portray certain signals of redstone based on the status of a object, EX:How much water is in a cauldron.) Not too good with rails, and minecart systems. Need brushing up on slime blocks.
Past Redstone Experience: 
Not really too much experience, mostly played on my friends' survival servers and build stuff like piston doors and automated farms.
About how often do you play Minecraft?: 
1-5 hours per day
Anything else you'd like to mention? (Optional): 
Application status: 
Not approved
What kind of creations would you like to build on this server?: 
Not really sure, mostly piston involving ones through. Figuring out how to make some of my previous builds more compact can also help.