If you are going to work in Riverside but are willing to live a little farther out or at least not live in the craphole that is Riverside I can give you some ideas. Or at least my opinion.
If you have the budget I would try to live in Orange County. It is much nicer but that also comes with a price. Housing is more in OC and the towns/cities are generally much nicer as well. There are still some reasonable place in OC to live and you are still only 10-15 minutes from the beach. Many people in the Riverside, Corona, San Bernardino area (commonly called the Inland Empier or IE) work in Orange County. The traffic in the mornings going from the IE to OC is absolutely unbearable. And is just as bad going back to the IE after work. If you lived in OC and worked in Riverside the traffic is really not bad at all. You would be going the opposite way of everybody else to and from work. Depending on where in OC you would be from 15-30 miles from Riverside.
If you wanted to stay so,ethereal a bit closer look at the town/cities of Chino Hills, Temecula, Murrieta, south end of Corona. IMO, stay out of Moreno Valley, Perris, Fontana, San Bernardino, Colton, Hemet and a few others in that area. PM me if you have any questions.