Leaderboard

For speed imo it is a mixture of breaking things into smaller chunks to play fast and challenge coordination at speed, taking breaks each time, but also playing slow again and again to get the lick into muscle memory without the left hand getting tired.

Control is more important than speed. Slow at first is always best, only play as fast as your ability to maintain control. Goes pretty much for any instrument really, not just guitar. Also, don't push yourself to complete two hours worth of learning in two hours. Six sessions of twenty minutes over a longer period of time is likely to be far more productive because it allows you time to absorb the learning to a much greater depth and that means you'll be less likely to forget it.

My number one piece of advice would be to keep on practicing daily, e.g. do at least a little on technical exercises as a warm up and then something you enjoy. Also the progress may sometimes feel slow, but will come eventually, it is just practice and repetition.