Hello,

Welcome to OSM.

I know you are still learning because this is new to you.  It may be useful to have a look at the documentation of the tags you are using: the OSM community has been writing a very comprehensive wiki with documentation about every tag.

For instance, "ele" is a tag aimed at storing a numerical value about the elevation (or altitude) of a place.  It is very rare to use it.  If you mean the height of an object, use "height" instead.  This tag also takes a simple value in meters, e.g. height=16 and not a bunch of text.  If you are unsure, you can fill the "description" tag, which is used to store a text describing what it is.

Same for material: this tag stores simple values, e.g. metal, wood… but be aware that if you fill a complicated text string no single third-party app would be able to understand it.