Summer is actually an ideal excuse to shave. You have *no* idea how much heat body hair traps, especially as an adult male with long, curly, had years to grow hair. If you shave your arms, be sure to flex vigorously and show off the guns. Also you're going to get horrible rash the first time you shave body areas, probably. Electric necessary to weedwhack first.
Any major changes you make will resonate stronger because you're changing a pre-set image that you've developed with people.
Womens slacks and jeans work, but the pocket space is non existent. Most things kept in womens' slack pockets, if they even have pockets, are probably going to fall out. I wear mens' slacks at work just because I need the storage space.
If you wear studs, try loops, they feminize your appearance quite a bit.
Lip gloss, try to find something in your natural shade, maybe one of burt's bees colored products. I once wore the wrong shade of shimmery lip tint and got called on it. Whewps.
It's a lot easier to find awesome womens' shoes than mens. Going and trying them on... a little more challenging. You can find androgynous shoes with some heel to them.
Also, perhaps a nice perfume. Black Phoenix Alchemy Lab (internet) makes a variety of insanely awesome bio-reactive oils that you just dollop on yourself at neck/wrist/etc and are very addictive.
Womens' button down shirts are also an option. They are big in the chest (breasts, really?) but tighter in the ribcage. Depending on how masculine your frame is, you may or may not be able to wear them. They're shorter in length so they work untucked without hanging down past your ass and looking tacky, or if you get a long length one designed to tuck in, there will be less bagginess. My biggest problem with them was that they're narrower in the shoulders, and even before I developed upper body muscles, they were too tight. A stretchy material is ideal.