I don't know what you like, but there's old disney films
Pop and Rock hits for easy violin
Some of those might have cross over with others. Some might have one or two you can play easily and several that will be a little hard for right now. But it's a lot easier learning music you're more familiar with. There are plenty other books out there like these, I just did a quick search of amazon and alfred. Music shops like Sam Ash, perhaps Guitar Center, and others will have some of these too.
As far as building music reading, it's just practice like anything else. I take many students through the I Can Read Music series because it eliminates a lot of extra information and just practices the basics. Setting the metronome at 60 and forcing your way through, trying to look ahead instead of what note you're currently playing is sometimes all you need. However, I got better at sigh reading by finding extra books with pieces I liked and reading through them.
edited because I can't format well...