An English longbow can be held vertically or canted. However the more vertical you hold an English longbow the greater the tendency to shoot left is, so hold your bow down at 45 degrees. Even then you'll have to turn your head slightly left and bring your string elbow down to get the arrow visually straight to the target,...

Put the tip of your arrow right on the point of aim before you start your draw. In other words start where you'll finish. It saves time. If your point is where it will be upon release all you have to do is get the shaft behind the tip. If your tip is on as the rotational draw
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So you need to find a head angle you can repeat and automatically lines the eye and anchor up rather than trying to line up an arrow with different eye to anchor angles. If you lean your upper body be sure to keep the head angle the same as the body angle changes. It's o.k. to lean the body at...

I recommend a tab rather than a glove. I used a glove for years, tried a tab one day and never used a glove again. Immediately I realized I got a cleaner release with the tab. All my fingers moved together with a tab rather than independently like with a glove. The main cause of plucking the string is one slow finger with a glove....