Transmission issues

My car is stuck in second gear. I can shift it just fine between park, reverse, and neutral. When I put it in drive it stays in second. I can even shift it to 1st gear and it drives but its still in second. Some other things are leading me to believe that maybe there is a loose connection or bad connection. The left blinker is glitchy. My speedometer will stop working while im driving down the street, the display that tells you what gear your in (park, reverse, etc.) Only works after I start the car, then after about ten seconds, everything lights up. Not sure if that has anything to do with the shifting issues but like I said, its leading me to believe that something electrical maybe? Obviously I dont know, or I wouldnt be asking on here. Lol. No money to go to a shop so I will be attempting to fix whatever the problem may be by myself so as much detail as you can give me would be great.