sparring
Firstly, spar on a noob account to start. Don't do it on your main at first, you'll regret it. My ratio, 480-1007(roughly), is very bad and would take considerable effort for me to fix. I got it all in 2013-2014, when I was 1/4 the skill level I am now. Yours on the other hand is not, if anything it is easily fixable.
Now, que only in the main room. That's where the good sparers are, and that's who you need to be facing in order to improve. Don't worry about losses at this stage, it's a practice account and it doesn't matter. Then go to the point where you can at least win one for every loss, and then switch back to your main(however good you want to be before sparring on your main is entirely your choice.)
After that, just be consistent. Try to not take excessive amounts of time off, because while some sparers can take months off and be just a little rusty, when building skill you can't do that.
And, as stated above by Kuz, read those spar guides! There are a lot of good tips and knowledge in there, no matter your device.
towering
There is no formula for having a successful tower guild. There just isn't. You can try and join a friends guild and hope they'll move the members on to you after they finish, but often that doesn't work(or doesn't work fast, anyway). The other option is slowly trying to build a small, but loyal, tower team that slowly gains traction.
Now, im gunna put a little PSA here. Being a tower leader is very difficult, and/or stressful. You'll get 100's of pms, stalkers, be targeted, and will have to make the difficult decisions when it comes to demoting leads. Just saying that as a warning, that doesn't mean you shouldn't lead one.
Now, to leading a guild. Finding good leads is difficult, especially those from none-USA time zones. Try to keep an eye out for good leads from other guilds farther along the road, because you may have a chance to get them to join you when they finish their current guild. Next, here's my list of towers, in order of which are easiest to attack.
1. MoD
2. Deadwood
3. Sardon
4. Swamp
5. Castle/destiny
Chances are when you're first starting out 4-5 won't even be an option to attack, let alone home. They are homed by the powerful guilds, and early on what you have at peak hours they have at bleak hours.
Other then that, good luck, because nothing is a guarantee and this towering advice may not help you much.