Gambling shouldn't be a skill in the first place. It is just a way of having fun. There is no such thing as "improving your gambling skills" unless you are a professional gambler and you are not a professional gambler. Then why even get obsessed with making money from gambling if you are not a pro?
If you want to make money get a different profession instead. When it comes to making money, the other jobs are way easier than gambling I am sure about that.
If you lost, you lost. There is no point in trying to get back what you lost. You can always play more if you want but not like this.