There is the only Taoist temple in the back of Mount Qingcheng. The Temple of the Southern Heavenly Ancestor If you're sincere about becoming a monk, they might be able to take you there. The conditions are very hard, and life is exceptionally poor. I don't know if you can take it. You can also go there to get used to it for a while, then come back if you can't stand it. Shiyan take the train to Chengdu, Chengdu take the high speed train to Qingcheng Mountain station, Qingcheng Mountain high speed train station to take a minibus to Taian Ancient Town in the back of Qingcheng Mountain. Tai'an Ancient Town walk to the back of the mountain Baiyun Temple, ask the Buddhist priests in the Baiyun Temple for directions, and then walk to the only Taoist temple in the back of the mountain, the Nantian Ancestor Hall (Nantian Ancestor Temple).
800 yuan won't cover it. You won't pay more than 150 RMB one way from Shiyan to the Nantian Ancestor Temple in the back of Mount Qingcheng. Shiyan-Chengdu train counts 100 RMB, Chengdu-Qingchengshan high-speed train 15 RMB, Qingcheng station-Qingchengshan back mountain 10 RMB. You don't need a ticket to enter the back mountain.
If you can't stand the hardship there and want to go home. A ****300 RMB for the round trip will be enough.