While one could rush through a tek in a day, it's better to schedule a weekend and be leisurely about it, especially in the beginning. That way you can take time understand what is happening at each step along the way.
No need to double or change any amounts, just stick to the tek as it's written and you'll more than likely be successful. Never throw anything away till you have a satisfactory yield of your final product, and feel free to stop in the chat with any questions or troubleshooting issues that may arise. Sometimes it can take a while for people to notice activity in the welcome chat so be patient if no one answers you right away.