Creating music is easy. Creating music that you like can be difficult.
There are several different ways of going about this and you should really think about your goals. If you want to perform on a stage you should consider going to an open mic format. There are more than just a people playing acoustic guitar. A lot of people play electronic music or whatever they want. It's essentially a blind date for people that want to make music and share it.
Set a schedule don't just play whenever you feel like it. Even if you are just learning things during that time. It will make it so in the time you aren't practicing you develop ideas. And when inspiration hits have a way to quickly get it down on a voice memo.
Don't be precious about completely songs. People who think too much about "the song" never get anything done. You can take your time but let it go. You can come back to songs later if you really want to but most people get a better sense of what they want to do after completing more songs. Just say " I'm writing a song today" and then do it. Make it simple. After you have that song finished it'll seem less daunting because you've already done it. Weezer's blue album had over a hundred songs written for it and they only have 10 on the album.
There is nothing wrong with tribute and cover bands. If it gets you on stage then go for it. Chances are you'll be playing music you love with other like-minded people who would play your songs when you aren't doing covers. The people who show up are usually excited because they know the songs and it gets you a foot in the door with the venue if they also have live music nights. You can always play a few originals. People typically won't care.
Good luck. Party on.