My question is, Wordpress blog posts are easy to be indexed in Google than Blogger?
A BIG NOOO!
It doesn't matter which one you use, it's just a matter of preference and what you feel comfortable with. Both have their pros and cons. Wordpress is flexible and has a lot of plugins which make things a lot easier as compared to blogger whereby you have to work with the html code.
So things like changing the theme for blogger can be a pain in the a$$ because that means you have to start all over again for things like metadata, things you changed in the header, google analytics code, webmater tools, posts code (if you changed it) etc.
But when it comes to SEO, it doesn't matter which platform you use, just as long as you know what you're doing. Obviously the optimization on blogger is not easy, you need to know a lot of coding unlike wordpress whereby you simply use plugins for most of the stuff.
In terms of indexing, non of them gets better indexed than the other
Last weeks, I have created some articles in my tech blog, it was created from blogger but these articles didn't get any traffic although I optimized articles for SEO.
So you want to create articles and do some on-page SEO then in 1 or 2 weeks rank high and get truck loads of traffic? You're dreaming, it doesn't work like that. If it was that easy then everyone would be doing it.
We would all be ranking pretty well and getting traffic. SEO takes a lot of time, money and effort. Get off lala-land and start working.
You have to remember that there are people who're already ranking for whatever keywords you're targeting, they worked hard and maybe even spent a lot of money to get there and to gain Google's trust. Then you just want to come and take over just like that? With simple on-page seo?
Do some proper SEO for your blog and offer high quality content then you'll get the traffic you desire. Prove yourself to Google and other search engines that your content deserves to be at the top, get people talking about your website and building organic backlinks for you. Work on the off-page seo as well and don't rely on your on-page seo only.
Switch your mindset and remember that it's not going to be as easy as optimizing the website then BAM you start ranking! Come back to the real world, you're in lala-land
Should I move to wordpress with my own domain name?
That's totally up to you, I've outrank big and popular websites using the free blogger platform but had to switch to wordpress for more flexibilty.