A couple of weeks ago, I posted about some websites where one could fin courses on music. This were formal education courses. Now I bring some sites that are more "practical" since they are aimed at learning some of the fundamentals of music and at learning how to play an instrument. One of them may suit your needs. I´ve been learning to play the guitar for some time now and I have used this webs to get some valuable exercises and advices.
There are a lot more and I will post some of them later on. In this ocassion I leave you this ones:
There are hundreds of websites to learn guitar, but most tend to be paid or to have just a few lessons for free. This site has a terrible design, because it is very old, but offers a free comprehensive course that progresses from the basics to advanced techniques. It will be very useful and you can supplement it with free video tutorials that offer sites like Ultimate Guitar (excellent tablature source) and Guitar Trice.
Wanting to learn to play the bass on the Internet can be more severe than the sound of the instrument. However, this site has everything you need: step by step lessons are complemented by audio and video, interactive instructions, questions and answers to test acquired knowledge and song samples to analyze and exercise. There are also some very lanyards online tools, such as a printer scales and patterns, and a metronome.
Ribeiro is a 27 years old guitarist and music composer, with jazz and classical formation, who won fame online as the Internet music teacher, giving daily lessons for free via the internet. His YouTube channel has more than 15,000 subscribers and has over 5 million views. But the key is to go to his personal site, where their video tutorials are organized according to an order, from what is a note and a chord or how to read music to recording tricks, tips to know what instrument you should learn or how to squeeze the sound of your guitar. The guy seems to be accelerated by 10 liters of Red Bull but the clips are very useful and fun. You can notice that he really puts effort and passion into this.
Hope they are helpful.