Strandman is right. Progress slowly when bouldering or injuries will occur. Also, get outside. Climbing on plastic has no correlation to real rock, other than movement. Use it solely for strength training and learning how to move on rock. Not a measurement of what grade you're climbing at. If you're climbing at a v3 level, when you go to the gym, climb all the v0 to v2 flawlessly without falling. Then get on that project. Once that project is dialed in, add it into the routine. I personaly think training on hang boards or lifting weights is a waste of time and it's boring. Just be active. Run, hike, climb in every discipline. Just some ideas that have helped me progress relatively injury free. Have fun and good luck!