Maybe you are in the wrong trade… otherwise try just setting a "work plan" for the job… like how much you want to accomplish each day and then stick to it… you are quite "new" to this all, with only 2 yrs going… it will slowly come to you over time, if you stick with it and take advice from pros who know from years of hands-on experience, how to best finish a job… perhaps you could hire a trustworthy old pro to work for you and let him help you learn the trade… just tell him upfront that you would appreciate his advice as he works for you…

Feel free to use this and my web site to help you along…

Good Luck!