Since you stay at Skudai near JB, you should be able to receive Singapore national TV channels, isn't? Perhaps it's time for you to watch more Singaporean channels for free? Lel...

Put your antenna high up like what you see at Muar town, hehe...

Nope I'm not from Johor, but I've been there before.
When you go to local hardware/electrical shop, make sure you buy an outdoor UHF antenna instead of VHF antenna. It is better that you choose the ones that has a lot of antenna elements, such as 14 elements and above. Usually the more the elements, the antenna will be longer and bigger (and yes, more expensive), hence the better the signal. Well, just to make sure that in case if higher ground block most of the signal, even you stay near to Johor Bahru.

You might see some antennas that seems to be 2-in-1 with VHF and UHF functions. Basically there's no need for you to buy VHF antenna anymore these days because digital TV in Malaysia, Singapore and even many other countries around world requires only UHF antenna for digital TV, unlike analogue TV where it is better that you have both VHF and UHF antennas installed. Just buy a UHF antenna will do.

And please ignore the antenna's packaging as there are no such thing "Digital TV antenna" "Support DVB-T2" "Crystal clear quality antenna" "HD antenna" or whatsoever.
Outdoor antenna is where the "metal sticks" job is to receive TV signal only, that's all. The antenna doesn't matter whether you are receiving analogue TV, digital TV with SD or HD or whatsoever... It is just marketing. In fact, you can use back your existing outdoor antenna to receive digital TV signals, if your antenna is still in good condition and not rusty or there is missing elements on the antenna. Or you can choose to buy a new one and a bigger one perhaps, as an upgrade from your existing antenna if it's still working fine.

And, is your TV has a built-in DVB-T2 tuner? If yes, good.
If no, a digital TV set-top-box is needed.

And for your info, Malaysia and Singapore will be using only DVB-T2 for digital TV broadcasting, not the older technology DVB-T anymore.

Feel free to ask me anything you want to know. Or you can Google the answers lol.

haha kaki skudai here also, pulai perdana actually and i get only 4mbps

If you're very sure that your smart TV comes with built-in DVB-T tuner instead of DVB-T2 tuner, then I have a bad news for you. You will not able to receive Malaysian digital TV channels, and might able to receive Singapore's Channel 5 and 8 only, or maybe can't receive any channels at all. (Channel U, Suria, Vasantham and Channel NewsAsia all cannot unless it is DVB-T2 tuner). Even if you can receive it, this is just temporary as Singapore will eventually shut down DVB-T and migrate to the latest DVB-T2. Do note that DVB-T tuners are not compatible with digital TV channels that is using the latest DVB-T2 standard. In this case, you got 2 options which is buy a Digital TV STB (set-top-box) with DVB-T2 tuner, connect your antenna cable to the STB and then watch the channels using the STB and make sure your TV input source is change to HDMI. Otherwise, buy a brand new TV and make sure it has built-in DVB-T2.

If you're staying at high floors buildings like apartment or condo, then indoor antenna may be adequate to receive digital TV signals like your friend does. But you said that you live at outskirt JB, so I am not sure whether is the signal strong enough to receive or not... You can give it a try though. If no signal, use an outdoor antenna then. But most importantly, you need to make sure you can receive DVB-T2 signals first. I believe there might have some stores in Johor will sell digital TV STB because many Johorians wants to watch Singapore's digital TV channels. Otherwise, you can buy it online.

FYI, Malaysia's digital TV is still under test transmission and will be officially launching on Nov/Dec 2016.