[AnisioLemos]

Hello guys, i tried a lot the forum search mechanism and havent found what i want, so im opening this thread.
To the problem, initially i thought it could be something with converting PDF to ePub using calibre, but i created some blank ePubs too and got the same problem.
I know nothing about css and html and initially edited the books using the book view, but inserting italic, bold, underline and hiperlinks to endnotes was making appear a lot of blank spaces between words and even more spaces during the whole process. So i tried to see what i could do editing html and css, while learning on the go, and for my surprise i have none css in stylesheet and none html in code view, even typing in new ePubs.
Probably im being dumb AF, but i found nothing about it and am here asking for help.
I'm using Sigil 0.9.7 in Antergos without plugins and with everything fully updated.
Ps. Sorry for my bad english, it isnt my mother language.