Hi,
It's pretty cool.
Here's a little random feedback.
If you only sing and don't help out in the production process, it limits you from truly expressing yourself. Although, there are exceptions, but not many.
Creating your own beat or instrument and then singing over it, literally, opens up a new world of creativity and opportunity. It allows you to fully express yourself and portray your message better. Again, there are exceptions.
There are times when an artist finds that perfect instrumental that is just what they were looking for and then the magic happens! But that doesn't happen often.
You'd be surprised how many artists help out during the beat making process. For example, Drake. One would assume that his producer "40" makes a beat and then gives it to Drake, but that isn't true.
Drake & 40 sit and vibe out in the studio. They drink, smoke, and they BOTH come up with a beat. Of course, 40 is the one doing all the technical stuff (editing, mixing etc.) but Drake is right there with him coming up with the ideas and melodies.
On the other than, everyone thinks Kanye West makes beats on his own. He did that back in the day. Today, there are 5 to 10 professional sound designers, composers, and engineers making beats/instrumentals with him! He also has writers helping out with lyrics as do most artists.
There are many artists who both rap/sing and producer, but it's not only them. They have help. There's nothing wrong with a little help. Two minds are better than one.
At the end of the day, as long as the artist can properly and naturally express themselves, it's a job well done.
Hope this helped,
Devin