Ok, I want to try and play Marth, I am new and learning. I went to play a level 9 falco, it always seems to grab me, get all the jabs on me and get all the hits. My point here is, how do I get better at the game, my timing etc.
For comboing, I would actually practice vs. lvl 1-4 cpus since they have pretty mixed DI. There are a ton of resources for tech related stuff (see the Advanced How to Play Videos) and you should definitely check out the Marth forums for guides/strategies on how to play him. I also recommend the 20XX hack pack if you can get it since it has a ton of useful features for learning (such as L-Cancel failing indicators, hitboxes, etc.)
Definitely try and find your local scene and play as many people as you can; just remember to play to learn. A typical trapping of new players is that they try to play to win in too many friendlies leading to bad habits and bad tournament results. Focus on reacting to what your opponent does and learning as much as you can.
Also, watch a lot of pro matches for your main and try to understand/replicate their strategies. They already did a lot of the leg work for you, you just need to grasp the theory.
Play Smash 4 instead. It's easier to get into and not going to be dead in a year. It just came out so you won't have to try to play catch-up with people who have been playing for 10 years, and it has online so you can play real people without having to go anywhere.
Lol what a terrible, nonconstructive comment. If you practice smart you can progress in a ridiculously short amount of time (see: aMSa). Why don't you go find a chess forum and tell new chess players they should play a different game because they are trying to play catch up with a 300 year old meta/people who have been playing most of their lives? Seriously, please take your game bashing somewhere else.