Assuming you don't want to pay a personal trainer - and I don't blame you - google the exercises you're doing and make sure you're using the correct form. Correct form is super important esp. at first, don't worry about how much weight you're using (within reason obv. you don't want to curl 10 pounds). Ramp things up slowly, increasing weight and frequency of workouts as you get comfortable and build a routine. And get a theraband (green) to help with TE, can use it as preventative measure even if not currently experiencing it.