There are related training courses on my website, but the free materials are not complete and may not be what you need, so it is not recommended to look for free courseware everywhere. My website is face to face payment. Although improving your ability may not be immediate, to be honest, from the perspective of improving your practice level, you may have a high understanding by leaps and bounds, not to mention a big improvement. Just a little, your income will increase several times and hundreds of times. Yes, and ability improvement is not a one-time use. He will be with you all his life, and your income can only be several hundred times or more than his. It is really worth it!

good luck