Good luck with your venture but rather than worry about the red tape etc yu need to ensure you have a good solid business plan
How much will you charge for courses
What is the competition like, what do they charge
What will you be doing that is so different to what is already available
How much will premises cost (outgoings, rent, tax, utilites, insurance, furniture etc)
How many people will you employ
How much will employing people cost (wages, employer social securty contributions, insurances etc)
What is your market and how many courses do you plan to run
What is the market demand
Advertising costs
What are your forecasts (profit, turnover, growth etc)
A lot to consider and I did a quick google search for English cousres in Andalucia, Alicante and and there is a lot of choice
Good luck but do your research and plan well