According to my pesonal experience one interesting way to set off to study a new language is throughout a kind of travel. I mean, Imagine you want to learn Spanish just because you're interented in traveling around through Spanish speaking countries. I would begin by imagine real situations you would deal with. From sending an email for making a boot in a hotel, as for a glass of water in the plane, asking for a information point at the arrival airport, telling a taxi driver where to go, trying to imagine a conversation for renting a car and all that stuff. Firstly I'd write down all those imaginary conversations in your own language and then try and translate into Spanish, but by studying all your grammar needs and vocabulary as you need them rather than struggling with grammar rules without a situation or a context where apply it. You'll have of course to study grammar and vocabulary but with an inmediate reward.

My answer will be not quite about Spanish, but simply about all languages. But of course it depends finally on you. My way for a start with a new language: 1. Try to learn some standards words and phrases, just like this examples: "My name is...", "How are you?" 2. Try to learn as so many new words as possible in a short time to build basis of vocabulary: to go, I go, to the school, to watch, I'm, I'm not, at home.....simply words basis. 3. Try to write short text about yourself and send it to the ITALKI notebook. And the most important thing: have fun with a new language!

I recommmend you Duolingo. It is free app.