First thing I'd say is I know where I'd put my fielders. So unless you absolutely middle it the most you are going to get is 1.
Secondly, your mindset seems to be hit, hit, hit. Whilst scoring is obviously the ultimate aim there is more than one way to do this. A pushed single off the back foot through point is going to score you the same amount as a smashed slog sweep that the man at wide long on collects one bounce. And the risk is significantly reduced. And if you do get yourself 'in' a little bit - that favoured leg side biff will become alot easier. You do connect with a few well so you cant forget that shot completely but patience and selection is key.
Thirdly I would echo what Blazer has said and value your wicket alot more. Make the bowler get you out, even if you bat in the lower order.
All my points are mental points rather than technical as these are what I would view as my own strengths. I am far from technically correct but manage to do ok.
Lastly, and its not a personal dig as I used to be a similar size, lose some weight. You can turn dots into singles and 1s into 2s and generally reduce fatigue if you bat for a while. Ive got alot fitter over the last 2/3 years and I reckon its added 5 runs onto my average