You are set. You have a Slimline dish with an SL3 SWM LNB, a SWM capable receiver and the requisite 21v power supply (PS). Connect the PS between the dish and the receiver. ODU connects to the dish and IRD connects to the receiver. In receiver settings, select SL3 and SWM. You have a tripod. Hopefully it is a TV4RV.com HD Tripod. Do I need to say that again. Obtain the settings for your locale preferably from Dishpointer.com or SatelliteFinder Android . Preset published Elevation and Tilt. Mount dish to a perfectly level/plumb, repeat perfectly level/plumb, tripod aimed ACCURATELY to the published magnetic Azimuth. You WILL have signal. Finish of with a meter if you want to peak it.
Unfortunately, you obviously are just starting to crawl. Being able to run will depend on you. Pay attention to detail and you will have signal. Works for me ALMOST every time.