Have you looked for local studios or agencies that will have the capacity to take you on or looked into apprenticeships? Training someone can be very rewarding but that trainee is something of a hinderance until they are up to speed, so in many cases it's not worthwhile for a single designer to take on an apprentice.
Failing that, there are LOADS of great online design courses. Just be sure you're joining a reputable one. There are also loads of tutorials on YouTube, though many are simple 'design X in Photoshop' which you don't want. Try and find content that covers the theory and thinking behind design rather than just the practical application.