Dmps, and those interested,
Upasaka Akila once asked similar question and did that at least with success: here as introducing encouragement (incl. those of the Buddha, in the links of the answer).
Kepping the eight percepts, even if not everyday, is for sure one of the clear signs that one is a serious and discerning follower of the Buddha, one with possible success and upwards (not only even) walking.
It's not so that it is a matter of "modern" or "earlier" life but timeless a matter of unskillful and skillful lifestyle. In all times there have been people just used to "modern" (e.g. beloved by many) life.
Practicing the Dhamma means to give, give up and withdraw (from unskilful deeds and way of life) and the eight precepts help where the defilements would be strong in arguing, like here an now.
Like with precets and virtue generally, it requires faith at first place and just following, because the tesults are unknown, can not be seen for now.
Best is possible to make it step by step. To start with one precept, add another, make one better, and so on.
How ever, it's good and useful to request them also formal from a monk/s or nun/s and to take/ask refuge before. Such does not only provide good sphere for questions but gives also a subtile and powerful drive.
In regard of precepts-training generally, this topic might be useful: Obsering the (5) precepts (it work for all similar.
Some "technical" explainings, althought my person is no friend of them, since taken from the Vinaya and not from the Suttas, with Commentary additions (good for wise, bad for not so wise), here:
Ñanavara Thera's Questions-and-answers concerning the Uposatha. and more infos and links here.
Generally suggest: it's good and needed to have, if no Community of monks, or a monk, is near, good friends who do and who are able to help. So to seek for like-minded or better companions would be the main task. Obiviously merely seldom to be found on common places.
Just short to you particular questions:
It's possible to chose modest sears anyway.
It's good to reduce the amount of meals, take no snakes an eat at fix time, also if maybe another timeframe. How ever, changing ones lifestyle and livelihood is natural and will be done.
Being confronted with entertainment is something out of ones controll, but to pay it attention, go after it, sing in mind... not. Giving up all foolish entertainments is very useful, at least also for ones wealth. Avoiding the entertainment by news and politic brings bliss.
Things get known when doing, so don't wast time. Tomorrow is not for sure to be and even one day observed is of great fruits, not to speak about sticking with it.
If questions or need of advices, always welcome, having lived a live of 5, 8, 9, 10 precepts serious still a lay person, there is knowing that it is possible and of benefit.
[Note: This is a gift of Dhamma and not meant for commercial purpose or other low wordily gains by means of trade and exchange.]