Voice enhancing in recordings

Good question, but kinda vague. 
 
So... what type of mic and gear signal path are you currently using?
 
What FX and plugins are you using in the box?
 
How far away from the mic are you singing?
 
Can you upload a sample of the music to a streaming site like Soundcloud and give us the link?  for now, though with under 25 posts you won't be able to post active links so post it like this....   www dot soundcloud dot com / yoursiteneame  and we can put it together to listen.
 
It took me a little bit of time to figure the whole thing out and get what I consider to be halfway decent vocals in the songs.... fill us in on what you're doing and perhaps we can help you get there a bit faster.
 
 
BTW: my current signal path is...  Rode NT2A condenser directly into my interface.... pop filter at 1 inch and singer's mouth is very close to the room side of the pop filter at 45 degrees to the capsule.  No FX in the vocal channel with limited reverb and EQ/comp in the vocal bus. Just a light dusting..... Think: "LESS IS MORE"...  that's my mantra. Get it right and you don't need FX to fix it.

Problem #1 is using a USB mic. That's not the best option. The USB mic acts like a second sound card and the computer has problems with that.
 
If the sound is "distant" try getting closer to the mic. I literally am inches at most away from the mic.
 
Yep gear signal path mean exactly that..... mic to the computer's sound card or in your case..... the USB port.
 
Most folks here start out with what they can but once they determine they are serious about making music, they buy a dedicated interface and get a "real mic" to use with it..... usually a condenser mic.  Doing that allows you to have ONE sound card for the DAW software. Currently, you're using 2. The USB mic is an input sound card and to hear things, you use the factory card with MME drivers. There's no way they sync their clocks and that will show up as tracks being out of sync. Latency is the proper word. One track plays behind the others. Sometimes they drift further out of sync as the song progresses.
 
There's a sticky for setting up a USB mic to be usable with Cake's software. I'll find the link and post it here for you to read. Perhaps you can get it to work OK.....
 
Here's the link>>>  http://forum.cakewalk.com/Guide-SONAR-usb-mic-Samson-C01u-or-C03u-mic-m1618556.aspx
 
 
Understand that the USB mic can work pretty well with straight up audio in smaller projects. So getting it to sound good is a matter of working with it.  Try singing closer to it for a start and see how that does.

Post the sample and let us know.

Reverb tends to pull sound further back, a combination of delay and minimal reverb may work better.
I don't know if you are used to listening to your voice. Some people just have a hard time believing their voice is what it is. 
 
I believe you should try double tracking and its variations with parallel compression: singing the same verses twice on different tracks or copying one take and moving it 10-20 ms to create a difference, (maybe pan them a little apart from each other). Then compress the other one and add the delay/reverb on that one, too. Then try different volume-combinations of those tracks. 

prm
 I’m planning to invest on an interface plus a better microphone, although I haven’t had the time yet to explore the different options.
That said I’m not sure these changes will have the expected impact, therefore I admit a certain procrastination.
 

Find the time. It will be on of the best favors you can do for yourself.
As Guitarhacker noted above, decent hardware can make a huge difference.
You don't need to break the bank, but you will be looking at few hundred dollars for basic start-up equipment.
Also consider your recording environment. A very lively room can contribute to that distant effect.
Ie, tile or hardwood floors, no soft surfaces such as furniture, curtains, carpet, can create a lot of echos that you brain filters out, but the mic is more than happy to pick up.

Thank you. I shall have a look into the external interfaces options.
 
In the meantime I will try the advice of using several tracks with different effects as suggested, although in the past I haven’t noticed any improvement with the compression. I might have not applied the adequate settings.