I would recommend going to powerbot.org and downloading the bot. After the download is complete register an account and go to www.powerbot.org/scripts , and adding AIO fisher(just click add). After this is done just sign in with the bot and hit run script in the top right right corner and select AIO fisher.
edit: I am willing to bet some RID/Simba fanboys will be here soon enough to rope you into using color bots but this is by far the simplest way. (99 Fishing on main using this script less than a week ago)