Step 1. Decide what your mission will be, and what action you will take to fulfill it.
Step 2. Gather info from others on here that have experience with a mission and style that is similar to what you hope to achieve. Use that to develop a realistic expectation of what rlsh will be like in actual application.
Step 3. Train, train, train. Once you know what to realistically expect, you will have a better idea of what to train for. Ask others for training tips and techniques to maximize the effectiveness of your training. Gathering as much quality information is part of training, so be sure to seek out as much as possible from reliable sources, to help you in achieving your mission goals. Decide what equipment you will need, and whether you will wear a uniform, and train in full gear whenever feasible.
Step 4. Make a list of your current contacts, and a separate list of contacts you hope to make. then take action to cultivate those contacts. The more allies you have the better. People who are sympathetic to your mission, as well as supportive of your method can make a world of difference.
Step 5. Analyze and evaluate. Once you feel you are adequately trained and ready to begin your mission, you will want to analyze the details, and evaluate your ability to perform your mission. If you find you are lacking, then either keep training until you are truly ready, or adjust your mission to fit your current level of ability. I recommend the former. More training is never a mistake.
I also must say this is in no way a comprehensive process that I have outlined, but it should help. Be sure to fill in the holes with advice from others on here. The more perspectives you gather, the better off you will be. I do also advise you to patrol with experienced rlsh before going out on your own. It is difficult to know how you will respond to a crisis situation until you are faced with one, and an experienced rlsh can help you cope if trouble should arise.