I'll just tell you my putting practice journey up to now.
1. I didn't want to buy a putting basket, so I just set up an upside down tomato cage. If i hit the feet, it made it in the basket. The best part about the tomato cage is that is is so small. It helps train accuracy and focus in the earliest stages.
2. The first time i tried it i was very frustrated/embarrassed. I couldn't stand anyone watch me. Just get over this stage.
3. I started researching the push putt. It was very frustrating dealing with nose down. I kept working through it. It took a long time but I made it somehow.
4. experimentation is key. If you want to know your self, you have to push your boundaries. Play around. Remember, putting is 100% open source. If you are missing, change your forum. Keep an open mind.
4a. Pay attention to patterns. If your foot is a few degrees off and then you miss, change it. Treat the entirety of your putting this way. Same for the mental game and eye contact with the basket.
5. Master all putting styles withing 15-20 feet. If you want a good game and a good ability to transfer from putting styles, practice doing so. Take a month to individually learn straddle, push, and spin from different people. For example, I practice Mcbeth style spin, Catrina Allen/Mcbeth syle straddle, and Wysocki/Feldberg stiff style push putt.
6. After mastering all 3 styles, practice them all together in one session. Start with your most comfortable style and get into the grove of that particular style. once you get there, move to the next style, and so on. Mentally, you need a good turn around rate. AKA, transfer from spin to push putt with out missing once after the transfer. It's very important to master this, as you may run into a big straddle after a failed spin.
7. All of the above sessions/should be about an hour in length. Now, half the practice time and make sure you start confidently and end with good putts. Like what Sean Clement said, your body or brain learns better when you start and end balanced. I believe this is the same for your brain. Emotionally balanced at the beginning and at the end.
This is not up to the current. I probably go through more stages, but I know that overall I have a better putting game than before. Roll with the punches and don't stop. Best of luck.