You cannot just read one book and some articles on Technical Analysis and some indicators and expect to be an expert and everything to just start falling into place and give you signals that will tell you when to buy and sell with precision and massive profits all the time.
It is like someone reading a book on how to drive a car and then expecting to drive flawlessly the first time they sit in the driver's seat, or someone reading a book on brain surgery and expecting to be able to operate on a live patient the next day.
It looks like you are using 3 or 4 indicators to get daily buy and sell signals on a daily chart for an ETF you're looking to hold for decades. So firstly you are using short term indicators for a long term outlook. You need to decide what timeframe you plan to hold your investments for and use chart periods and indicators that suit that timeframe.
Secondly, each indicator can be used in a number of ways and the settings you use for each indicator can determine whether you get earlier or later signals. Also, you need to work out which indicators work well together and are complementary, compared to those that don't work well together and give conflicting signals.
All this information will come together for you the more you read about and practice the art of Technical Analysis.
If your timeframe is very long-term (decades) I would be using mainly a weekly chart, with a longer period MA, the ROC indicator and possibly some trend lines. Keep it simple. The price itself is very important too. You can determine when a trend is starting or has ended purely using the price. The definition of an uptrend is higher highs and higher lows, so on the weekly chart if there is a lower high followed by a lower low - this could be the end of the uptrend. If we get a lower low followed by a lower high - this again could be the end of the uptrend. These could be a good time to start getting cautious and maybe looking to sell. If you are using stop losses (which I recommend) this may be a good time to tighten your stops.
Similarly, a downtrend is defined as lower lows and lower highs. If we get a higher low followed by a higher high it could be the end of the downtrend and maybe the start of an uptrend. This could be a good time to start getting ready to buy.
You need to learn about how and where to set your buy and sell orders (including stops) and whether you wait for confirmation when you get a signal.
All this takes some time, but the more you read, the more you attend live events and the more you practice the more they will become second nature. In order to get the best out of Technical Analysis you will need to learn, plan, practice and execute.
A good book to help you prepare your trading plan is "Smart Trading Plans" by Justine Pollard. One of my favourite books is "The Complete Trading Course - Price Patterns, Strategies, Setups, and Execution Tactics" by Corey Rosenbloom. And another good book is "Trade your Way to Financial Freedom" by Van Tharp.