I also consider it possible that there is no actual material reality and that maybe something is the case like the brain in a vat theory, however, science has some correlation to what reality is, either it being a material world or not, since technology manufactures all kind of apparatus that functions in the uttermost precise way by using science, meaning science is able to with the greatest accuracy predict how things will behave in certain situations to the extent being able to manipulate the outcome of an otherwise unpredictable outcome...
Your reasoning reminds me of the metaphysical philosophy Descartes explores in his Meditationes De Prima Philosophia II with the overly famous cogito ergo sum, I think therefor I am (tho if you dont know what he meant by that its far more logical imo to say I am therefor I think, which of course is a naturalistic notion), by which he meant that it seemed that we could not be certain about anything, however one thing after all seemed sure to him: that he was able to think therefor I (something) must exist...
I find this to be a very solid notion - and quite an obvious one - with regards to the existing of something however not that this Implies an I or a self and also not, like you state, that it means there is a material world, that there actually is a spoon, the weigth of the spoon in your hand and so on could very well all be strictly mental (to use a notion we can to some extent comprehend).
There are definetely things of which we can say they seem to be illusions, like (I cant think of the correct word) that the world would consist out of a plurality, since its quite obvious to me everything is one, everything is made up out of the same elements and all in existence constantly interacts with each other... Yet we believe our selves to be ultimately individual, separate entities, this imo due to the modern notion of the ego (in the middle ages its supposed to have been different, ppl didnt so much think in terms of I but more in terms of us...).