I want to make a rug

I really need to learn how to sew. There's an old sewing machine in the basement that came with the house. I should check it out and see it if works. But would it be easier to learn how to sew on a newer sewing machine? I've used sewing machines a couple times in my life and they don't seem too difficult. I think the most difficult part would be threading the bobbins (?) and making a straight line.

See I need to learn to sew because there's so many things I want to make. One of them right now being a rug. I could buy one, but the crafty side of me wants to make one. I think it would be neat to make a rag rug out of old t-shirts from Goodwill, or old bed sheets. We try not to hold on to unused things so I have to either raid my in-laws' closets or go to Goodwill for these things.

How neat it would be to make a rug like that. I've found a version that doesn't require sewing though. And I think I might like this version better. I wonder how hard it would be to make a big one of these. Like, 6 x 4. 

I also think a shag rug would look cute in my baby's room. I'd make this out of old t-shirts too, with all sorts of random colors throughout the rug. 

I'll have to decide what I want to do and do it. When (or if) I get around to making one I'll post the progress here.