If you enjoy gliding book yourself a weeks course in the spring with a good instructor you will get 30 or 40 launches for not much cash then decide what to do from there. If you can only commit time at weekends then power makes more sense, you can book a slot and most times you will fly, again make sure you have a good instructor - and a deep pocket.
i would advise against doing abinitio flights in poor weather, get used to flying in good conditions plenty of time for challenging conditions later.
Warning flying is addictive, it can seriously damage your wealth, and if you think gliding is cheap look at the cost of a decent single seater, new or S/H.