#1
I dunno if anyones posted something asking the same question, and if so Im sorry but what are some songs I should learn to practice singing while playing?
Sometimes I put a rubberband around my nuts and practice my Coheed & Cambria vocals

"Good eye, sniper
I shoot, you run"
#2
Mordred's Song by Blind Guardian, it has some pretty easy rythm parts and some parts where Marcus sings in the chorus...
#3
lets see...the songs that helped me learn to sing and play at the same time were... Slide by the Goo Goo Dolls, Times Like These by Foo Fighters, and i know there's more but i forget the rest.
Genocidal club #3. i was promised respect....

Cuando moría; Vi todo cerca de mí, todo lejos de mí, y todo adentro de mí. El cielo fue abierto, y en oblivio, me olvidé.
#4
Glycerine - Bush
Wonderwall - Oasis
Then just keep practicing with progressively more complex rhythms.