Hi Mate, I live in Perth and have a red jacket trailersailer which I've taken to garden island many times in as much as 30knot winds, most of the red jackets, red eagles, red witches, etc have a concrete fixed keel, but you can sail into water no more than waist deep.
Question on practicality of Different keels:
You can get retractable keels, these are keels that mechanically move up and down, this means easier to launch or go into shallow water, but also more moving parts and easier to break off a keel, and once the keel breaks off the yacht is most stable upside down, unfortunately a few Perth sailors lost their lives last year when their keel came off offshore at night, and they had a bolt on keel.
There are also water ballast keels, in this case the yacht is much lighter so if you need to motor along you can get the yacht up on a plane which isn't possible in other yachts (
www.gumtree.com.au/s-ad/collie/sail-boats/trailer-sailer/1218701026 is a good example of one of these, and you can motor at supposedly 20knots+) , the water ballast sucks in sea water to give it bottom weight and stabilise itself, this creates a flat bottom yacht which is good for beaching, risks here are that some put a tank on each side of the yacht (see
www.sailboat-cruising.com/water-ballast-system.html) and for novice sailors if you accidentally tack or jibe you risk flipping.
The there are fixed keels, more stability and less risk of things going wrong, but less flexibility, if you are looking at yachts with concrete keels like the red witches, make sure that the rio bar inside the concrete has not rusted and expanded causing the concrete to shatter.
Last options is no keel at all, you can look at multi hulls, tend to be faster, but they are most stable upside down, then again the saying is a keel boat is most stable on the bottom of the ocean, they are a lot more pricey if you want something with decent cabin room.
I'm sure other sailors on here with more experience than myself will have their own thoughts on practicalities,
My two cents is its like buying your first car, get something small and nimble that you don't mind putting a few dents in and is cheap/ easy to repair, then move into something a little larger for your nights away.