It would depend what specifically the bot you want to create will end up doing. Creating a bot to go through a web page and extract all images on it is quite different from say a bot that will buy and sell on a market exchange. In the case of creating an upvote bot for Steemit, I would suggest learning a computer language like Python first, then using a Steemit API for Python, like @xeroc's Piston. There are other libraries for other languages, but Python seems to be the go-to language. Learning computer programming is not something that can be done for the faint of heart. I would suggest going the route of a prepackaged solution like Steemian.com if you're not really into it.